# Salzer and Kipfmueller 2005 Southern Colorado Plateau Temperature and Precipitation Reconstructions #----------------------------------------------------------------------- # World Data Service for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program #----------------------------------------------------------------------- # Template Version 4.0 # Encoding: UTF-8 # NOTE: Please cite original publication, NOAA Landing Page URL, dataset and publication DOIs (where available), # and date accessed when using these downloaded data. If there is no publication information, please cite investigator, study title, NOAA Landing Page URL, and date accessed. # # NOAA_Landing_Page: https://www.ncdc.noaa.gov/paleo/study/6328 # Landing_Page_Description: NOAA Landing Page of this file's parent study, which includes all study metadata. # # Study_Level_JSON_Metadata: https://www.ncei.noaa.gov/pub/data/metadata/published/paleo/json/noaa-recon-6328.json # Study_Level_JSON_Description: JSON metadata of this file's parent study, which includes all study metadata. # # Data_Type: Climate Reconstructions # # Dataset_DOI: # # Science_Keywords: Air Temperature Reconstruction #------------------- # Resource_Links # # Data_Download_Resource: https://www.ncei.noaa.gov/pub/data/paleo/treering/reconstructions/northamerica/usa/colorado-plateau2005-precip-noaa.txt # Data_Download_Description: NOAA Template File; Precipitation Reconstruction Data # # Original_Source_URL: # Original_Source_Description: # #------------------- # Contribution_Date # Date: 2005-09-01 #------------------- # File_Last_Modified_Date # Date: 2022-03-31 #------------------- # Title # Study_Name: Salzer and Kipfmueller 2005 Southern Colorado Plateau Temperature and Precipitation Reconstructions #------------------- # Investigators # Investigators: Salzer, M.W.; Kipfmueller, K.F. #------------------- # Description_Notes_and_Keywords # Description: Southern Colorado Plateau multi-millennial tree-ring temperature and precipitation reconstructions. Three lower forest border tree-ring chronologies were used in the precipitation reconstruction. Measured ring-width series from construction timbers from archaeological sites are appended to the earlier portions of measured series from living trees at the three sites to substantially lengthen the records. Upper treeline Bristlecone Pine (P. aristata), whose ring-width variability is a function of temperature, were sampled at timberline in the San Francisco Peaks (~3,536 m). Increment core and sawed samples were collected from living and dead Bristlecone Pine on both Agassiz Peak and Humphreys Peak. Long chronologies were constructed by crossdating the deadwood samples with the living tree specimens. Prior to AD 659 the chronology is composed entirely of deadwood material. Through conservative standardization techniques and the use of relatively long series, care was taken to preserve low-frequency information in the chronology. The climate data used in the temperature reconstruction calibration are from the Fort Valley Experimental Research Station, which is part of the United States Historical Climatology Network. The station data, from an elevation of 2,239 m and approximately 4.5 km from the high elevation SFP tree-ring sites, span the period 1909-1994. #------------------- # Publication # Authors: Salzer, M.W. and K.F. Kipfmueller # Journal_Name: Climatic Change # Published_Title: Reconstructed Temperature and Precipitation on a Millennial Timescale from Tree-Rings in the Southern Colorado Plateau, U.S.A. # Published_Date_or_Year: 2005-06-01 # Volume: 70 # Issue: 3 # Pages: 465 - 487 # Report_Number: # DOI: 10.1007/s10584-005-5922-3 # Full_Citation: # Abstract: Two independent calibrated and verified climate reconstructions from ecologically contrasting tree-ring sites in the southern Colorado Plateau, U.S.A. reveal decadal-scale climatic trends during the past two millennia. Combining precisely dated annual mean-maximum temperature and October through July precipitation reconstructions yields an unparalleled record of climatic variability. The approach allows for the identification of thirty extreme wet periods and thirty-five extreme dry periods in the 1,425-year precipitation reconstruction and 30 extreme cool periods and 26 extreme warm periods in 2,262-year temperature reconstruction. In addition, the reconstructions were integrated to identify intervals when conditions were extreme in both climatic variables (cool/dry, cool/wet, warm/dry, warm/wet). Noteworthy in the reconstructions are the post-1976 warm/wet period, unprecedented in the 1,425-year record both in amplitude and duration, anomalous and prolonged late 20th century warmth, that while never exceeded, was nearly equaled in magnitude for brief intervals in the past, and substantial decadal-scale variability within the Medieval Warm Period and Little Ice Age intervals. #------------------- # Funding_Agency # Funding_Agency_Name: # Grant_Number: #------------------- # Site_Information # Site_Name: Navajo Mountain # Location: Utah # Northernmost_Latitude: 37.02 # Southernmost_Latitude: 37.02 # Easternmost_Longitude: -110.85 # Westernmost_Longitude: -110.85 # Elevation_m: 2286 #------------------- # Data_Collection # Collection_Name: precip_salzer2005 # First_Year: -250 # Last_Year: 1996 # Time_Unit: AD # Core_Length_m: # Parameter_Keywords: reconstructions # Notes: #------------------- # Chronology_Information # Chronology: #------------------- # Variables # # PaST_Thesaurus_Download_Resource: https://www.ncdc.noaa.gov/paleo/skos/past-thesaurus.rdf # PaST_Thesaurus_Download_Description: Paleoenvironmental Standard Terms (PaST) Thesaurus terms, definitions, and relationships in SKOS format. # # Variables format: shortname what,material,error,units,seasonality,data_type,detail,method, C(har) or N(umeric) data,additional information # ## age age,,,year Common Era,,climate reconstructions;tree ring,,,N, ## precip precipitation,ring width,,centimeter,Oct-Jul,climate reconstructions;tree ring,,,N, #------------------------------- # Data: # Missing_Values: NA age precip 570 20.62 571 29.46 572 31.86 573 32.65 574 41.42 575 48.13 576 35.44 577 31.04 578 21.05 579 24.45 580 25.46 581 28.26 582 29.47 583 26.15 584 24.02 585 28.21 586 28.68 587 33.98 588 22.71 589 39.22 590 19.53 591 21.66 592 30.97 593 31.86 594 34.19 595 35.37 596 28.16 597 27.57 598 27.24 599 25.26 600 35.67 601 34.48 602 31.06 603 24.71 604 22.65 605 28.58 606 20.88 607 23.94 608 33.12 609 30.27 610 29.29 611 18.72 612 27.51 613 23.43 614 23.61 615 19.31 616 23.89 617 23.47 618 27.17 619 23.49 620 19.70 621 31.91 622 42.31 623 32.18 624 29.07 625 24.62 626 19.52 627 28.07 628 30.45 629 35.25 630 16.17 631 26.54 632 27.21 633 21.05 634 21.79 635 29.11 636 41.03 637 34.17 638 33.10 639 25.87 640 23.69 641 39.32 642 30.65 643 30.52 644 27.12 645 15.03 646 17.00 647 22.46 648 25.44 649 29.05 650 29.09 651 19.80 652 23.89 653 27.77 654 21.39 655 30.57 656 32.32 657 30.85 658 29.85 659 33.92 660 16.87 661 25.61 662 27.50 663 18.24 664 17.17 665 36.05 666 27.38 667 37.87 668 31.61 669 22.67 670 27.73 671 25.75 672 34.56 673 34.65 674 30.67 675 28.64 676 30.84 677 17.74 678 22.61 679 30.37 680 22.56 681 27.66 682 27.21 683 29.63 684 38.05 685 28.94 686 19.80 687 30.39 688 33.38 689 34.97 690 26.89 691 37.18 692 27.69 693 32.83 694 22.78 695 37.93 696 25.94 697 27.61 698 27.83 699 24.20 700 23.20 701 25.90 702 22.96 703 25.07 704 15.15 705 22.35 706 20.08 707 21.92 708 28.76 709 22.98 710 23.62 711 23.47 712 19.80 713 25.15 714 24.44 715 27.38 716 24.59 717 21.13 718 21.46 719 27.08 720 29.06 721 24.46 722 25.49 723 20.56 724 19.85 725 28.69 726 25.82 727 31.64 728 35.07 729 28.72 730 42.82 731 43.14 732 33.07 733 31.43 734 29.61 735 27.01 736 32.50 737 28.38 738 16.64 739 22.92 740 31.07 741 24.58 742 21.44 743 28.15 744 23.50 745 29.16 746 27.91 747 30.88 748 26.77 749 27.24 750 24.10 751 18.46 752 23.42 753 22.85 754 22.07 755 27.31 756 26.73 757 19.65 758 25.55 759 33.46 760 26.90 761 23.09 762 26.85 763 26.83 764 25.50 765 34.99 766 36.66 767 25.75 768 37.07 769 26.58 770 25.88 771 25.48 772 35.54 773 25.96 774 21.09 775 27.63 776 30.88 777 24.45 778 21.15 779 18.91 780 30.50 781 29.19 782 19.93 783 32.32 784 32.27 785 29.77 786 24.92 787 30.45 788 25.31 789 30.86 790 26.87 791 21.67 792 26.24 793 36.01 794 24.86 795 20.28 796 26.33 797 17.66 798 31.34 799 27.54 800 37.24 801 31.85 802 28.34 803 38.24 804 39.00 805 35.97 806 29.74 807 23.86 808 19.76 809 16.33 810 29.61 811 26.88 812 29.71 813 31.93 814 24.70 815 27.59 816 22.26 817 20.26 818 22.25 819 22.34 820 39.36 821 39.86 822 36.62 823 19.42 824 22.08 825 16.50 826 27.46 827 24.61 828 28.92 829 18.37 830 17.89 831 31.15 832 23.00 833 30.84 834 29.00 835 25.71 836 29.18 837 24.26 838 29.16 839 23.62 840 16.50 841 22.83 842 23.83 843 32.82 844 24.83 845 27.02 846 25.14 847 18.41 848 26.70 849 21.49 850 28.56 851 21.33 852 33.01 853 28.66 854 32.64 855 27.84 856 34.81 857 25.24 858 37.01 859 28.37 860 23.81 861 28.57 862 27.33 863 26.47 864 28.18 865 21.19 866 27.76 867 20.18 868 21.03 869 30.15 870 22.63 871 25.55 872 24.76 873 32.44 874 29.77 875 23.52 876 37.48 877 23.92 878 20.76 879 22.59 880 25.66 881 29.64 882 23.56 883 18.75 884 18.68 885 26.65 886 28.10 887 32.73 888 35.52 889 27.33 890 30.06 891 28.48 892 21.17 893 30.37 894 23.29 895 25.30 896 30.15 897 39.15 898 39.80 899 60.72 900 24.39 901 25.76 902 26.33 903 22.58 904 19.21 905 27.52 906 20.87 907 19.50 908 28.58 909 25.32 910 23.95 911 33.58 912 25.41 913 26.70 914 28.62 915 27.97 916 21.59 917 31.55 918 30.68 919 32.07 920 19.25 921 25.20 922 21.07 923 19.40 924 17.67 925 24.91 926 28.87 927 29.09 928 39.61 929 30.84 930 22.01 931 34.87 932 29.63 933 25.62 934 22.86 935 23.80 936 25.83 937 22.29 938 27.97 939 27.96 940 31.05 941 34.67 942 35.99 943 24.92 944 29.85 945 34.72 946 37.13 947 31.23 948 34.73 949 36.92 950 31.68 951 24.01 952 29.86 953 26.03 954 15.51 955 20.08 956 28.58 957 20.45 958 24.84 959 33.26 960 44.44 961 27.41 962 28.18 963 31.19 964 27.35 965 33.32 966 30.21 967 25.16 968 23.27 969 19.85 970 29.95 971 24.24 972 16.94 973 40.86 974 28.44 975 21.22 976 22.50 977 32.10 978 20.89 979 24.14 980 14.96 981 15.33 982 25.51 983 27.32 984 21.75 985 32.66 986 34.91 987 36.94 988 49.83 989 48.13 990 26.20 991 18.22 992 27.02 993 17.60 994 25.66 995 24.36 996 31.16 997 20.53 998 25.98 999 22.24 1000 28.93 1001 18.53 1002 22.95 1003 24.14 1004 29.33 1005 16.00 1006 27.93 1007 31.83 1008 29.73 1009 20.54 1010 25.95 1011 28.23 1012 28.89 1013 24.71 1014 18.41 1015 29.30 1016 29.88 1017 32.63 1018 22.49 1019 16.77 1020 36.94 1021 31.10 1022 23.64 1023 28.22 1024 37.50 1025 25.45 1026 26.38 1027 29.40 1028 27.73 1029 30.85 1030 27.81 1031 25.75 1032 29.66 1033 23.46 1034 28.94 1035 19.59 1036 18.79 1037 26.39 1038 28.34 1039 23.22 1040 24.54 1041 19.01 1042 28.06 1043 27.91 1044 22.25 1045 30.37 1046 23.62 1047 41.41 1048 21.21 1049 34.80 1050 30.86 1051 31.21 1052 38.39 1053 26.77 1054 37.14 1055 23.27 1056 31.84 1057 29.38 1058 29.18 1059 24.41 1060 32.88 1061 36.64 1062 29.04 1063 34.81 1064 40.69 1065 44.94 1066 33.60 1067 15.59 1068 23.48 1069 22.06 1070 28.09 1071 23.55 1072 27.21 1073 23.67 1074 24.01 1075 27.44 1076 26.68 1077 28.84 1078 23.33 1079 34.12 1080 40.32 1081 21.20 1082 31.95 1083 28.43 1084 31.32 1085 17.66 1086 17.96 1087 39.90 1088 30.55 1089 27.02 1090 18.88 1091 17.79 1092 28.94 1093 21.96 1094 22.75 1095 23.76 1096 23.82 1097 20.60 1098 23.04 1099 19.21 1100 27.62 1101 20.86 1102 30.96 1103 31.74 1104 27.92 1105 33.00 1106 26.98 1107 18.41 1108 23.02 1109 30.96 1110 34.26 1111 32.82 1112 34.04 1113 24.57 1114 27.69 1115 31.67 1116 35.26 1117 32.63 1118 34.36 1119 33.18 1120 28.97 1121 18.36 1122 33.08 1123 23.67 1124 30.18 1125 25.38 1126 20.70 1127 29.01 1128 35.09 1129 35.27 1130 34.37 1131 22.02 1132 27.06 1133 28.36 1134 22.57 1135 23.34 1136 27.92 1137 25.75 1138 22.23 1139 26.10 1140 20.75 1141 27.16 1142 27.44 1143 30.14 1144 24.15 1145 33.20 1146 20.21 1147 24.94 1148 23.32 1149 28.21 1150 16.76 1151 20.61 1152 33.16 1153 24.36 1154 29.01 1155 37.16 1156 23.64 1157 27.42 1158 17.72 1159 35.49 1160 33.60 1161 22.38 1162 36.53 1163 34.73 1164 26.15 1165 31.88 1166 23.87 1167 39.38 1168 24.40 1169 18.05 1170 25.15 1171 24.10 1172 27.85 1173 29.66 1174 25.55 1175 16.18 1176 25.88 1177 20.02 1178 28.08 1179 26.83 1180 27.14 1181 27.80 1182 19.03 1183 21.36 1184 32.57 1185 24.31 1186 17.55 1187 21.91 1188 25.19 1189 24.12 1190 32.83 1191 23.57 1192 31.26 1193 26.38 1194 33.01 1195 37.44 1196 31.79 1197 40.03 1198 26.05 1199 27.08 1200 31.19 1201 33.67 1202 30.07 1203 32.33 1204 33.77 1205 25.09 1206 25.89 1207 24.02 1208 21.49 1209 34.12 1210 28.65 1211 31.03 1212 32.86 1213 28.01 1214 24.69 1215 21.72 1216 18.33 1217 19.35 1218 22.52 1219 30.72 1220 26.50 1221 21.56 1222 27.53 1223 31.28 1224 25.87 1225 22.73 1226 27.43 1227 15.49 1228 32.53 1229 30.96 1230 32.24 1231 26.06 1232 34.96 1233 22.63 1234 23.68 1235 29.94 1236 24.49 1237 26.24 1238 34.55 1239 30.40 1240 24.42 1241 33.63 1242 33.15 1243 34.45 1244 23.44 1245 23.39 1246 19.47 1247 22.15 1248 33.91 1249 35.31 1250 28.38 1251 16.99 1252 23.68 1253 31.64 1254 15.70 1255 29.80 1256 30.58 1257 30.93 1258 17.25 1259 46.14 1260 32.38 1261 29.58 1262 30.47 1263 17.66 1264 21.72 1265 26.94 1266 31.23 1267 31.56 1268 32.17 1269 35.55 1270 24.63 1271 32.06 1272 31.19 1273 23.77 1274 26.52 1275 35.58 1276 23.12 1277 26.65 1278 21.67 1279 26.79 1280 23.45 1281 25.46 1282 27.54 1283 23.75 1284 30.26 1285 24.23 1286 22.95 1287 30.28 1288 22.20 1289 36.22 1290 35.63 1291 27.47 1292 21.07 1293 22.98 1294 22.73 1295 18.82 1296 23.05 1297 20.29 1298 26.18 1299 18.81 1300 22.86 1301 26.84 1302 32.47 1303 33.72 1304 25.67 1305 30.41 1306 24.89 1307 22.35 1308 24.57 1309 28.32 1310 29.43 1311 25.07 1312 31.53 1313 36.16 1314 30.19 1315 23.34 1316 16.62 1317 26.18 1318 26.61 1319 30.58 1320 32.98 1321 34.74 1322 30.26 1323 25.88 1324 29.02 1325 39.25 1326 41.58 1327 40.53 1328 32.96 1329 33.24 1330 32.99 1331 43.61 1332 37.19 1333 47.93 1334 33.76 1335 21.68 1336 28.57 1337 26.88 1338 21.09 1339 22.87 1340 27.86 1341 23.80 1342 25.39 1343 26.26 1344 24.61 1345 25.44 1346 26.20 1347 22.41 1348 25.11 1349 29.59 1350 19.18 1351 21.23 1352 22.70 1353 29.57 1354 29.56 1355 22.08 1356 28.97 1357 30.28 1358 30.04 1359 29.26 1360 21.55 1361 21.25 1362 19.79 1363 21.78 1364 22.52 1365 27.84 1366 27.20 1367 26.84 1368 28.15 1369 27.66 1370 32.61 1371 27.01 1372 27.14 1373 35.02 1374 36.96 1375 27.61 1376 24.03 1377 27.29 1378 33.65 1379 23.14 1380 33.48 1381 30.77 1382 32.96 1383 32.50 1384 32.67 1385 32.40 1386 29.59 1387 26.68 1388 27.87 1389 21.60 1390 19.52 1391 22.48 1392 29.43 1393 23.30 1394 29.15 1395 24.46 1396 27.79 1397 26.50 1398 21.17 1399 22.32 1400 24.72 1401 25.08 1402 22.25 1403 23.29 1404 30.38 1405 27.23 1406 28.83 1407 25.70 1408 25.95 1409 29.92 1410 21.89 1411 23.68 1412 25.93 1413 21.86 1414 30.57 1415 22.72 1416 23.31 1417 28.00 1418 25.89 1419 26.76 1420 31.11 1421 21.47 1422 30.60 1423 21.73 1424 27.31 1425 24.52 1426 28.92 1427 33.63 1428 37.90 1429 33.45 1430 30.21 1431 31.01 1432 27.52 1433 32.50 1434 33.49 1435 23.36 1436 23.98 1437 22.81 1438 20.50 1439 21.28 1440 27.34 1441 30.89 1442 23.48 1443 23.09 1444 25.08 1445 23.41 1446 21.04 1447 25.30 1448 21.87 1449 21.38 1450 20.22 1451 28.19 1452 26.25 1453 29.18 1454 24.82 1455 16.07 1456 25.31 1457 24.09 1458 30.17 1459 22.27 1460 19.73 1461 22.48 1462 31.04 1463 24.66 1464 17.06 1465 25.58 1466 32.64 1467 36.37 1468 34.42 1469 33.88 1470 29.26 1471 19.42 1472 21.16 1473 24.58 1474 27.11 1475 23.39 1476 27.15 1477 32.45 1478 30.88 1479 25.24 1480 26.99 1481 27.71 1482 33.63 1483 27.37 1484 37.52 1485 29.94 1486 33.28 1487 25.62 1488 27.33 1489 28.72 1490 29.89 1491 34.52 1492 31.01 1493 29.67 1494 31.45 1495 17.64 1496 27.03 1497 28.74 1498 31.15 1499 24.49 1500 19.38 1501 27.35 1502 27.07 1503 27.58 1504 32.46 1505 26.35 1506 23.00 1507 31.31 1508 31.52 1509 40.69 1510 25.06 1511 38.47 1512 34.98 1513 35.40 1514 32.89 1515 30.87 1516 26.15 1517 24.47 1518 25.83 1519 30.61 1520 26.56 1521 23.39 1522 17.72 1523 26.18 1524 23.91 1525 25.92 1526 35.15 1527 25.49 1528 26.26 1529 26.13 1530 32.20 1531 24.36 1532 17.51 1533 24.22 1534 27.97 1535 27.94 1536 35.50 1537 33.46 1538 19.65 1539 32.33 1540 30.64 1541 28.42 1542 16.05 1543 27.34 1544 20.62 1545 22.96 1546 28.62 1547 21.67 1548 23.81 1549 32.19 1550 33.86 1551 29.57 1552 31.72 1553 31.84 1554 29.17 1555 33.21 1556 38.19 1557 33.50 1558 32.39 1559 29.40 1560 31.35 1561 25.18 1562 28.37 1563 29.03 1564 36.23 1565 39.77 1566 31.52 1567 28.88 1568 34.24 1569 31.74 1570 34.15 1571 24.36 1572 28.40 1573 20.87 1574 23.71 1575 24.79 1576 23.19 1577 28.90 1578 26.30 1579 19.22 1580 18.63 1581 25.46 1582 20.55 1583 19.05 1584 14.61 1585 15.09 1586 25.11 1587 23.20 1588 26.50 1589 24.25 1590 17.74 1591 20.37 1592 19.27 1593 21.64 1594 33.05 1595 26.82 1596 29.47 1597 23.63 1598 23.13 1599 30.93 1600 17.58 1601 20.85 1602 27.87 1603 27.02 1604 28.42 1605 30.66 1606 30.41 1607 26.65 1608 26.95 1609 34.84 1610 34.41 1611 30.09 1612 25.45 1613 22.11 1614 30.02 1615 32.68 1616 30.72 1617 32.86 1618 36.77 1619 30.88 1620 36.40 1621 41.49 1622 33.00 1623 19.57 1624 21.41 1625 24.83 1626 17.84 1627 29.42 1628 22.61 1629 26.65 1630 25.21 1631 25.60 1632 18.67 1633 26.01 1634 25.80 1635 31.14 1636 23.50 1637 20.54 1638 22.22 1639 27.52 1640 35.32 1641 32.77 1642 32.01 1643 29.66 1644 34.26 1645 28.75 1646 26.59 1647 32.17 1648 19.60 1649 30.27 1650 30.07 1651 40.24 1652 28.30 1653 30.37 1654 17.57 1655 30.48 1656 30.36 1657 25.49 1658 21.54 1659 28.21 1660 31.59 1661 33.46 1662 27.17 1663 27.85 1664 24.54 1665 27.19 1666 23.26 1667 21.63 1668 18.99 1669 21.37 1670 15.32 1671 22.84 1672 24.41 1673 27.35 1674 32.37 1675 24.56 1676 19.85 1677 29.76 1678 27.53 1679 22.98 1680 36.15 1681 37.20 1682 30.48 1683 41.75 1684 21.23 1685 16.88 1686 21.41 1687 31.25 1688 29.03 1689 34.30 1690 32.90 1691 30.83 1692 39.56 1693 38.49 1694 26.89 1695 32.88 1696 22.03 1697 26.23 1698 27.90 1699 27.80 1700 20.47 1701 33.67 1702 24.40 1703 20.03 1704 25.47 1705 30.53 1706 25.92 1707 23.55 1708 20.67 1709 26.15 1710 31.95 1711 26.83 1712 30.92 1713 24.82 1714 29.22 1715 25.77 1716 22.67 1717 26.32 1718 35.23 1719 32.09 1720 45.27 1721 32.68 1722 23.75 1723 35.72 1724 24.61 1725 34.33 1726 41.86 1727 32.86 1728 18.52 1729 16.70 1730 23.26 1731 27.31 1732 33.39 1733 23.35 1734 24.66 1735 15.66 1736 23.24 1737 22.40 1738 28.55 1739 20.29 1740 20.80 1741 31.04 1742 23.53 1743 33.32 1744 25.04 1745 36.92 1746 46.67 1747 44.15 1748 18.53 1749 41.47 1750 25.13 1751 21.88 1752 17.04 1753 19.35 1754 23.04 1755 18.17 1756 24.92 1757 22.63 1758 29.84 1759 29.63 1760 36.42 1761 26.91 1762 31.20 1763 23.06 1764 39.91 1765 21.86 1766 38.71 1767 27.42 1768 34.50 1769 28.04 1770 25.16 1771 36.17 1772 29.89 1773 17.74 1774 27.09 1775 25.84 1776 26.50 1777 24.26 1778 17.51 1779 24.52 1780 19.60 1781 25.10 1782 19.48 1783 24.71 1784 38.55 1785 22.90 1786 24.84 1787 36.19 1788 21.33 1789 22.77 1790 19.12 1791 29.66 1792 34.22 1793 44.05 1794 28.38 1795 33.09 1796 28.76 1797 29.47 1798 25.03 1799 31.07 1800 25.04 1801 19.86 1802 28.13 1803 22.49 1804 28.80 1805 21.43 1806 21.71 1807 31.01 1808 24.76 1809 31.38 1810 21.49 1811 30.97 1812 25.42 1813 16.86 1814 25.58 1815 27.13 1816 34.51 1817 24.85 1818 17.69 1819 19.54 1820 17.28 1821 27.99 1822 15.27 1823 21.15 1824 25.26 1825 30.05 1826 35.29 1827 28.37 1828 43.57 1829 22.63 1830 27.83 1831 28.56 1832 24.50 1833 34.34 1834 22.99 1835 34.22 1836 29.04 1837 37.47 1838 38.96 1839 42.32 1840 39.95 1841 28.96 1842 21.56 1843 25.05 1844 33.48 1845 18.37 1846 26.57 1847 15.22 1848 27.34 1849 42.18 1850 37.96 1851 21.04 1852 36.20 1853 29.83 1854 26.44 1855 29.97 1856 31.94 1857 20.53 1858 31.32 1859 24.83 1860 21.36 1861 16.16 1862 34.09 1863 22.66 1864 18.44 1865 31.66 1866 35.93 1867 34.19 1868 46.02 1869 33.38 1870 23.59 1871 23.10 1872 22.12 1873 19.41 1874 28.80 1875 23.13 1876 22.64 1877 25.07 1878 26.76 1879 19.88 1880 21.89 1881 21.24 1882 18.78 1883 21.81 1884 28.62 1885 29.16 1886 26.60 1887 19.63 1888 27.65 1889 28.85 1890 33.97 1891 33.29 1892 34.19 1893 22.67 1894 20.48 1895 27.92 1896 16.76 1897 28.31 1898 24.28 1899 16.31 1900 18.35 1901 21.10 1902 14.79 1903 26.16 1904 15.61 1905 31.00 1906 30.01 1907 32.83 1908 31.04 1909 32.12 1910 26.73 1911 33.14 1912 35.93 1913 27.18 1914 35.46 1915 39.83 1916 38.20 1917 35.11 1918 24.84 1919 34.76 1920 41.17 1921 28.48 1922 37.64 1923 32.73 1924 31.29 1925 27.42 1926 33.13 1927 29.18 1928 24.83 1929 26.24 1930 25.35 1931 24.56 1932 32.88 1933 24.65 1934 23.26 1935 30.38 1936 21.66 1937 32.14 1938 31.15 1939 24.83 1940 23.35 1941 35.45 1942 32.06 1943 22.56 1944 27.94 1945 26.40 1946 20.31 1947 21.42 1948 26.51 1949 32.90 1950 21.37 1951 16.39 1952 33.18 1953 21.81 1954 21.44 1955 20.83 1956 17.33 1957 25.44 1958 22.71 1959 17.00 1960 26.80 1961 22.38 1962 23.25 1963 19.74 1964 21.09 1965 31.40 1966 26.12 1967 23.94 1968 25.18 1969 30.37 1970 25.09 1971 18.13 1972 24.03 1973 31.22 1974 21.50 1975 33.04 1976 26.27 1977 17.91 1978 30.62 1979 34.20 1980 33.78 1981 25.67 1982 34.87 1983 39.80 1984 30.62 1985 43.37 1986 37.08 1987 33.87