Svalbard Ice Cores 600 Year Annual d18O Data ----------------------------------------------------------------------- World Data Center for Paleoclimatology, Boulder and NOAA Paleoclimatology Program ----------------------------------------------------------------------- NOTE: PLEASE CITE ORIGINAL REFERENCE WHEN USING THIS DATA!!!!! NAME OF DATA SET: Svalbard Ice Cores 600 Year Annual d18O Data LAST UPDATE: 5/2011 (Original receipt by WDC Paleo) CONTRIBUTORS: Isaksson, E., D. Divine, J. Kohler, T. Martma, V. Pohjola, H. Motoyama, and O. Watanabe. IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2011-068 WDC PALEO CONTRIBUTION SERIES CITATION: Isaksson, E., et al. 2011. Svalbard Ice Cores 600 Year Annual d18O Data. IGBP PAGES/World Data Center for Paleoclimatology Data Contribution Series # 2011-068. NOAA/NCDC Paleoclimatology Program, Boulder CO, USA. ORIGINAL REFERENCE: Isaksson, E., D. Divine, J. Kohler, T. Martma, V. Pohjola, H. Motoyama, and O. Watanabe. 2005. Climate oscillations as recorded in Svalbard ice core d18O records between 1200-1997 AD. Geografiska Annaler: Series A, Physical Geography, Vol. 87, Issue 1, pp. 203-214, March 2005. DOI: 10.1111/j.0435-3676.2005.00253.x ABSTRACT: We apply two different time series analytical tools to d18O records from two Svalbard ice cores. One ice core is from Lomonosovfonna at 1250 m a.s.l. and the other from Austfonna at 750 m a.s.l. These cores are estimated to cover at least the past 800 years and have been dated using a combinationof known reference horizons and glacial modelling. Wavelet analysis reveals low frequency oscillations on the 60-120-year scale on the lower elevation site Austfonna while the higher altitude site on Lomonosovfonna does not reveal such variability throughout the record. The second method, Significant Zero Crossing of Derivates (SiZer) does not resolve the low-frequency periodicity seen in the wavelet analysis. The low-frequency variability resolved by the wavelet analysis is similar to what has been found in various climate records including instrumental temperatures and tree-rings, and has been proposed as the most important oscillation for the observed trends in Arctic air temperatures. ADDITIONAL REFERENCES: Isaksson, E., V. Pohjola, T. Jauhiainen, J. Moore, J.-F. Pinglot, R. Vaikmäe, R.S.W. van de Wal,J.-O. Hagen, J. Ivask, L. Karlöf, T. Martma, H.A.J. Meijer, R. Mulvaney, M.P.A. Thomassen, and M. Van den Broeke. 2001. A new ice core record from Lomonosovfonna, Svalbard: viewing the data between 1920-1997 in relation to present climate and environmental conditions. Journal of Glaciology, 47(157): 335-345. DOI: 10.3189/172756501781832313 Watanabe, O., H. Motoyama, M. Igarashi, K. Kamiyama, S. Matoba, K. Goto-Azuma, H. Narita, and H. Kameda. 2001. Studies on climatic and environmental changes during the last few hundred years using ice cores from various sites in Nordaustlandet, Svalbard. Memoirs of National Institute of Polar Research, Special Issue, 54: 227-242. GEOGRAPHIC REGION: Arctic PERIOD OF RECORD: 1400 - 1998 AD FUNDING SOURCES: Norwegian Polar Institute, The Norwegian Research Council, NARP and NIPR. DESCRIPTION: Annual oxygen isotope (d18O) data from the Lomonosovfonna and Austfonna ice cores, Svalbard, for the past 600 years. Austfonna 1999 Ice Core (289m length): 79°50'N, 24°01'E, 750m elev. Lomonosovfonna 1997 Ice Core (121m length): 78°51'53"N, 17°25'30"E, 1255m elev. DATA: 1. Lomonosovfonna 1997 ice core d18O YearAD d18O (per mil) 1400 -15.62 1401 -15.74 1402 -15.92 1403 -16.21 1404 -15.60 1405 -15.81 1406 -15.82 1407 -15.68 1408 -15.19 1409 -16.15 1410 -15.94 1411 -15.21 1412 -14.92 1413 -15.80 1414 -15.43 1415 -15.11 1416 -15.76 1417 -15.40 1418 -15.19 1419 -15.11 1420 -14.63 1421 -15.00 1422 -15.86 1423 -15.65 1424 -15.07 1425 -15.05 1426 -14.61 1427 -14.63 1428 -14.69 1429 -14.76 1430 -14.87 1431 -15.04 1432 -15.52 1433 -15.31 1434 -15.41 1435 -15.65 1436 -16.17 1437 -15.68 1438 -15.05 1439 -15.49 1440 -15.52 1441 -15.97 1442 -15.79 1443 -15.65 1444 -15.55 1445 -15.47 1446 -15.43 1447 -15.50 1448 -15.56 1449 -15.50 1450 -15.21 1451 -14.94 1452 -15.70 1453 -15.92 1454 -16.96 1455 -15.67 1456 -15.47 1457 -15.44 1458 -15.97 1459 -15.37 1460 -14.91 1461 -14.94 1462 -15.34 1463 -15.47 1464 -15.64 1465 -16.43 1466 -16.22 1467 -15.89 1468 -14.99 1469 -15.25 1470 -15.76 1471 -16.01 1472 -15.69 1473 -15.75 1474 -15.69 1475 -15.20 1476 -15.96 1477 -15.42 1478 -14.86 1479 -15.53 1480 -15.40 1481 -15.52 1482 -15.61 1483 -15.47 1484 -15.83 1485 -15.99 1486 -16.07 1487 -16.63 1488 -15.71 1489 -15.85 1490 -15.72 1491 -15.99 1492 -15.38 1493 -15.74 1494 -15.61 1495 -15.60 1496 -15.28 1497 -15.49 1498 -15.52 1499 -15.41 1500 -16.11 1501 -15.57 1502 -15.96 1503 -16.23 1504 -16.31 1505 -16.48 1506 -15.98 1507 -15.48 1508 -15.92 1509 -15.78 1510 -15.85 1511 -16.56 1512 -15.71 1513 -15.28 1514 -16.06 1515 -15.39 1516 -15.30 1517 -15.80 1518 -15.36 1519 -15.13 1520 -15.57 1521 -15.56 1522 -14.76 1523 -14.92 1524 -15.27 1525 -15.73 1526 -16.01 1527 -15.55 1528 -16.21 1529 -15.65 1530 -15.34 1531 -15.20 1532 -14.72 1533 -15.88 1534 -16.04 1535 -16.10 1536 -16.21 1537 -15.72 1538 -15.69 1539 -15.60 1540 -15.66 1541 -14.85 1542 -16.47 1543 -16.04 1544 -15.19 1545 -15.41 1546 -15.44 1547 -15.67 1548 -15.59 1549 -15.86 1550 -14.48 1551 -15.76 1552 -16.04 1553 -15.10 1554 -16.21 1555 -16.04 1556 -15.24 1557 -16.39 1558 -16.85 1559 -16.36 1560 -16.63 1561 -15.52 1562 -14.77 1563 -15.33 1564 -15.93 1565 -15.69 1566 -14.63 1567 -15.77 1568 -14.58 1569 -14.63 1570 -15.98 1571 -16.83 1572 -16.79 1573 -16.67 1574 -15.93 1575 -16.01 1576 -16.01 1577 -15.03 1578 -15.73 1579 -15.42 1580 -16.14 1581 -16.07 1582 -16.80 1583 -15.86 1584 -15.87 1585 -16.21 1586 -15.85 1587 -16.21 1588 -16.52 1589 -16.00 1590 -16.71 1591 -16.56 1592 -15.96 1593 -16.25 1594 -15.76 1595 -15.90 1596 -17.38 1597 -16.19 1598 -15.91 1599 -16.58 1600 -17.13 1601 -16.99 1602 -16.24 1603 -16.80 1604 -16.10 1605 -16.83 1606 -16.55 1607 -16.26 1608 -16.48 1609 -16.09 1610 -15.49 1611 -16.46 1612 -16.67 1613 -16.57 1614 -16.68 1615 -15.40 1616 -15.93 1617 -15.72 1618 -15.66 1619 -15.74 1620 -15.35 1621 -15.33 1622 -15.91 1623 -15.82 1624 -16.14 1625 -15.40 1626 -16.01 1627 -15.85 1628 -15.54 1629 -16.30 1630 -16.77 1631 -16.94 1632 -16.33 1633 -17.21 1634 -16.54 1635 -17.79 1636 -17.50 1637 -16.68 1638 -16.09 1639 -17.00 1640 -17.24 1641 -16.11 1642 -15.71 1643 -16.33 1644 -15.61 1645 -15.31 1646 -16.57 1647 -15.70 1648 -15.24 1649 -15.25 1650 -15.10 1651 -16.63 1652 -16.75 1653 -16.83 1654 -15.96 1655 -16.17 1656 -16.40 1657 -16.92 1658 -16.00 1659 -15.88 1660 -15.62 1661 -15.43 1662 -16.21 1663 -15.86 1664 -15.82 1665 -16.10 1666 -16.09 1667 -17.24 1668 -16.37 1669 -17.57 1670 -16.73 1671 -15.82 1672 -16.20 1673 -15.78 1674 -16.20 1675 -16.58 1676 -17.34 1677 -16.63 1678 -16.66 1679 -16.16 1680 -16.41 1681 -15.78 1682 -16.18 1683 -16.25 1684 -16.34 1685 -15.60 1686 -16.52 1687 -16.02 1688 -15.63 1689 -15.41 1690 -16.01 1691 -15.39 1692 -15.63 1693 -16.54 1694 -16.93 1695 -16.00 1696 -16.60 1697 -16.03 1698 -16.08 1699 -16.11 1700 -16.38 1701 -17.28 1702 -15.76 1703 -15.57 1704 -16.07 1705 -16.25 1706 -15.60 1707 -15.95 1708 -16.44 1709 -16.29 1710 -16.60 1711 -16.52 1712 -16.78 1713 -16.83 1714 -16.88 1715 -15.54 1716 -16.29 1717 -15.83 1718 -16.14 1719 -16.07 1720 -14.10 1721 -15.44 1722 -14.36 1723 -15.21 1724 -17.36 1725 -16.81 1726 -17.28 1727 -16.40 1728 -15.72 1729 -16.81 1730 -16.17 1731 -15.95 1732 -16.01 1733 -15.38 1734 -15.92 1735 -16.09 1736 -16.76 1737 -16.31 1738 -16.12 1739 -16.35 1740 -15.97 1741 -15.15 1742 -15.89 1743 -15.96 1744 -16.28 1745 -17.21 1746 -16.36 1747 -16.76 1748 -16.77 1749 -16.60 1750 -16.07 1751 -15.91 1752 -17.07 1753 -16.58 1754 -16.16 1755 -14.92 1756 -15.03 1757 -16.02 1758 -16.77 1759 -16.85 1760 -16.33 1761 -16.40 1762 -15.77 1763 -15.24 1764 -15.25 1765 -16.15 1766 -17.95 1767 -16.72 1768 -17.14 1769 -16.36 1770 -15.90 1771 -16.17 1772 -16.84 1773 -16.15 1774 -16.34 1775 -16.22 1776 -16.74 1777 -17.11 1778 -17.40 1779 -16.70 1780 -16.04 1781 -16.59 1782 -15.95 1783 -16.67 1784 -17.41 1785 -17.76 1786 -17.18 1787 -17.48 1788 -16.49 1789 -16.93 1790 -16.71 1791 -16.67 1792 -16.28 1793 -16.73 1794 -16.07 1795 -16.55 1796 -16.72 1797 -17.17 1798 -16.97 1799 -16.62 1800 -16.34 1801 -16.40 1802 -16.56 1803 -17.43 1804 -16.60 1805 -17.02 1806 -16.36 1807 -16.45 1808 -16.30 1809 -16.22 1810 -16.24 1811 -16.01 1812 -16.63 1813 -16.11 1814 -16.79 1815 -16.61 1816 -16.25 1817 -15.41 1818 -16.26 1819 -16.68 1820 -17.71 1821 -16.03 1822 -17.37 1823 -17.36 1824 -18.72 1825 -16.20 1826 -17.27 1827 -17.05 1828 -16.37 1829 -16.19 1830 -16.86 1831 -16.21 1832 -15.69 1833 -15.90 1834 -15.58 1835 -15.65 1836 -16.30 1837 -16.45 1838 -17.10 1839 -16.99 1840 -16.42 1841 -15.68 1842 -16.21 1843 -15.75 1844 -16.00 1845 -16.16 1846 -17.03 1847 -16.26 1848 -17.15 1849 -19.07 1850 -16.46 1851 -18.04 1852 -17.86 1853 -17.97 1854 -18.54 1855 -16.00 1856 -15.96 1857 -17.66 1858 -16.97 1859 -15.61 1860 -15.61 1861 -15.80 1862 -17.75 1863 -16.06 1864 -15.56 1865 -15.76 1866 -16.20 1867 -16.04 1868 -17.09 1869 -18.07 1870 -17.00 1871 -17.59 1872 -16.44 1873 -16.27 1874 -15.89 1875 -16.27 1876 -17.16 1877 -18.01 1878 -17.67 1879 -17.69 1880 -17.57 1881 -16.96 1882 -16.88 1883 -15.71 1884 -16.25 1885 -16.78 1886 -17.11 1887 -16.63 1888 -16.88 1889 -16.53 1890 -16.88 1891 -16.45 1892 -16.00 1893 -16.13 1894 -15.86 1895 -15.71 1896 -16.04 1897 -15.71 1898 -16.54 1899 -16.30 1900 -16.30 1901 -15.98 1902 -15.48 1903 -15.56 1904 -15.87 1905 -15.89 1906 -15.54 1907 -15.48 1908 -15.55 1909 -15.78 1910 -15.32 1911 -16.97 1912 -16.00 1913 -15.85 1914 -16.03 1915 -16.64 1916 -16.29 1917 -15.55 1918 -17.55 1919 -16.94 1920 -16.87 1921 -15.99 1922 -15.55 1923 -14.19 1924 -14.82 1925 -15.49 1926 -15.44 1927 -15.27 1928 -15.48 1929 -14.68 1930 -15.40 1931 -14.48 1932 -14.64 1933 -15.99 1934 -15.84 1935 -15.49 1936 -14.84 1937 -15.45 1938 -15.63 1939 -15.52 1940 -15.39 1941 -16.11 1942 -15.78 1943 -16.66 1944 -16.55 1945 -16.37 1946 -15.75 1947 -15.92 1948 -17.14 1949 -14.76 1950 -14.88 1951 -15.45 1952 -14.64 1953 -16.81 1954 -15.68 1955 -16.29 1956 -15.51 1957 -15.79 1958 -16.73 1959 -15.63 1960 -15.88 1961 -16.76 1962 -16.77 1963 -15.96 1964 -17.84 1965 -17.00 1966 -17.73 1967 -16.27 1968 -16.13 1969 -15.31 1970 -15.93 1971 -14.70 1972 -15.59 1973 -15.49 1974 -16.07 1975 -15.97 1976 -15.53 1977 -16.21 1978 -15.92 1979 -15.17 1980 -14.55 1981 -15.80 1982 -16.39 1983 -15.77 1984 -16.11 1985 -16.04 1986 -15.21 1987 -15.18 1988 -15.82 1989 -15.64 1990 -16.53 1991 -15.81 1992 -16.14 1993 -16.08 1994 -17.20 1995 -15.01 1996 -15.17 1997 -18.07 2. Austfonna 1999 ice core d18O (per mil) YearAD d18O Austfonna 1400 -19.73 1404 -17.59 1405 -19.64 1407 -18.41 1408 -18.51 1409 -19.55 1410 -18.96 1412 -18.99 1413 -17.68 1414 -17.78 1415 -16.70 1416 -17.41 1418 -18.99 1419 -19.29 1421 -17.23 1422 -18.30 1424 -18.89 1425 -18.87 1426 -18.17 1428 -17.66 1429 -18.24 1430 -20.66 1432 -19.70 1433 -18.63 1434 -19.16 1436 -19.99 1437 -17.26 1438 -17.72 1439 -19.10 1441 -17.87 1442 -19.35 1443 -21.69 1445 -19.57 1446 -17.55 1447 -17.66 1448 -17.31 1450 -17.46 1451 -18.16 1452 -17.43 1453 -18.13 1454 -16.58 1456 -17.33 1457 -15.77 1458 -16.62 1460 -17.18 1461 -16.98 1463 -18.14 1464 -17.64 1465 -18.45 1467 -17.29 1468 -16.43 1469 -16.79 1471 -16.89 1472 -15.79 1474 -17.81 1475 -17.41 1476 -19.34 1478 -17.82 1479 -17.75 1481 -20.45 1482 -21.49 1484 -18.87 1485 -20.07 1486 -18.92 1488 -20.11 1489 -19.15 1490 -19.17 1492 -18.75 1493 -18.00 1494 -22.51 1495 -20.27 1497 -20.49 1498 -21.22 1500 -20.64 1501 -18.50 1502 -18.43 1504 -17.25 1505 -18.41 1506 -19.72 1507 -19.38 1509 -18.98 1510 -19.63 1511 -19.57 1513 -17.11 1514 -17.96 1515 -16.21 1516 -15.19 1517 -18.78 1519 -19.17 1520 -21.99 1521 -19.83 1522 -20.00 1523 -17.39 1525 -19.08 1526 -18.17 1527 -17.17 1528 -17.12 1529 -18.25 1531 -17.91 1532 -18.88 1533 -20.01 1534 -19.66 1535 -18.86 1537 -19.80 1538 -19.96 1539 -17.36 1540 -19.39 1541 -18.07 1543 -19.88 1544 -18.75 1545 -17.96 1546 -17.87 1548 -19.92 1549 -19.51 1550 -20.17 1551 -18.02 1552 -18.54 1554 -17.56 1555 -19.69 1556 -19.26 1557 -19.71 1558 -16.33 1559 -18.36 1561 -18.89 1562 -17.23 1563 -18.73 1564 -18.86 1565 -18.69 1567 -18.19 1568 -18.58 1569 -17.39 1570 -17.32 1571 -16.88 1572 -18.06 1573 -17.92 1575 -19.28 1576 -17.55 1577 -17.15 1578 -18.53 1579 -16.69 1580 -15.44 1581 -14.82 1582 -15.88 1584 -17.33 1585 -17.62 1586 -20.00 1587 -19.34 1588 -18.43 1589 -17.29 1590 -18.84 1591 -18.28 1592 -19.66 1593 -17.55 1594 -16.69 1596 -17.95 1597 -18.97 1598 -16.66 1599 -17.57 1600 -18.92 1601 -18.57 1602 -20.00 1603 -18.92 1604 -18.19 1605 -18.74 1606 -19.53 1607 -21.09 1608 -19.84 1609 -18.54 1610 -18.77 1611 -18.82 1612 -18.74 1613 -20.29 1614 -20.63 1615 -19.03 1616 -17.36 1617 -17.05 1618 -17.56 1619 -18.04 1620 -19.51 1621 -21.89 1622 -20.01 1624 -17.93 1625 -18.70 1626 -21.04 1627 -19.25 1628 -20.04 1629 -18.93 1630 -20.01 1631 -21.05 1632 -19.76 1633 -20.31 1634 -18.33 1635 -19.15 1637 -20.47 1638 -18.61 1639 -18.56 1640 -18.96 1641 -18.85 1642 -16.41 1643 -18.06 1644 -17.87 1645 -19.38 1646 -20.06 1647 -18.75 1648 -18.49 1649 -18.43 1650 -19.63 1651 -18.90 1652 -19.55 1653 -17.83 1654 -18.80 1655 -19.79 1656 -20.20 1657 -17.32 1658 -18.36 1659 -19.00 1660 -19.19 1661 -19.13 1662 -18.16 1663 -18.05 1664 -17.91 1665 -16.57 1666 -18.02 1667 -16.55 1668 -18.03 1669 -16.35 1670 -16.92 1671 -17.50 1672 -16.81 1673 -18.53 1674 -18.14 1675 -19.71 1676 -17.87 1678 -21.13 1679 -19.86 1680 -20.10 1681 -19.67 1682 -20.44 1683 -19.86 1684 -18.00 1685 -18.16 1686 -16.74 1687 -19.85 1688 -18.64 1689 -15.21 1690 -17.78 1691 -18.28 1692 -24.21 1693 -21.13 1694 -18.73 1695 -18.97 1696 -19.52 1697 -18.06 1698 -17.08 1699 -16.93 1700 -16.42 1701 -18.23 1702 -16.64 1703 -17.62 1704 -20.19 1705 -19.09 1706 -21.99 1707 -20.47 1708 -17.64 1709 -17.42 1710 -18.93 1711 -20.55 1712 -19.97 1713 -19.45 1714 -18.01 1715 -19.14 1716 -19.48 1717 -19.19 1718 -18.74 1719 -16.25 1720 -16.47 1721 -19.44 1722 -18.90 1723 -17.11 1724 -17.26 1725 -19.67 1726 -20.50 1727 -17.36 1728 -15.28 1729 -17.04 1730 -18.26 1731 -19.37 1732 -18.29 1733 -19.36 1734 -19.98 1735 -19.98 1736 -18.80 1737 -17.52 1738 -16.47 1739 -16.58 1740 -17.87 1741 -15.26 1742 -17.63 1743 -17.08 1744 -17.00 1745 -17.32 1746 -15.82 1747 -16.73 1748 -20.19 1749 -21.58 1750 -18.02 1751 -20.96 1752 -20.68 1753 -19.48 1754 -20.48 1755 -19.20 1756 -19.73 1757 -16.39 1758 -17.09 1759 -16.88 1760 -17.19 1761 -19.38 1762 -22.08 1763 -19.45 1764 -19.70 1765 -18.56 1766 -18.27 1767 -17.31 1768 -18.35 1769 -19.06 1770 -20.29 1771 -23.62 1772 -21.49 1773 -19.74 1774 -19.26 1775 -20.99 1776 -21.32 1777 -20.32 1778 -19.56 1779 -17.71 1780 -20.30 1781 -21.28 1782 -20.27 1783 -19.91 1784 -18.76 1785 -19.42 1786 -20.02 1787 -19.92 1788 -21.35 1789 -22.24 1790 -21.78 1791 -20.29 1792 -21.75 1793 -19.15 1794 -20.63 1795 -19.45 1796 -19.01 1797 -19.45 1798 -19.03 1799 -20.64 1800 -19.42 1801 -20.72 1802 -20.77 1803 -19.76 1804 -18.89 1805 -19.91 1806 -21.96 1807 -19.73 1808 -18.86 1809 -20.38 1810 -19.96 1811 -21.52 1812 -17.85 1813 -19.06 1814 -19.46 1815 -20.80 1816 -18.74 1817 -19.05 1818 -18.45 1819 -15.75 1820 -17.22 1821 -18.82 1822 -20.25 1823 -18.78 1824 -18.84 1825 -18.31 1826 -19.22 1827 -20.04 1828 -19.37 1829 -21.15 1830 -19.10 1831 -19.80 1832 -20.80 1833 -19.50 1834 -21.22 1835 -21.09 1836 -21.21 1837 -20.77 1838 -20.40 1839 -19.51 1840 -22.73 1841 -18.95 1842 -18.76 1843 -19.03 1844 -17.02 1845 -19.47 1846 -19.11 1847 -17.82 1848 -17.91 1849 -17.18 1850 -18.01 1851 -21.83 1852 -20.22 1853 -19.45 1854 -19.19 1855 -18.76 1856 -17.28 1857 -19.52 1858 -15.65 1859 -18.18 1860 -19.37 1861 -18.91 1862 -17.93 1863 -17.10 1864 -18.80 1865 -18.32 1866 -19.93 1867 -19.16 1868 -16.61 1869 -17.32 1870 -17.07 1871 -18.48 1872 -18.06 1873 -18.94 1874 -18.02 1875 -19.32 1876 -19.23 1877 -18.72 1878 -17.39 1879 -18.33 1880 -16.55 1881 -17.22 1882 -16.44 1883 -15.34 1884 -20.06 1885 -18.21 1886 -17.04 1887 -18.75 1888 -20.05 1889 -18.25 1890 -15.68 1891 -15.34 1892 -16.35 1893 -17.01 1894 -18.44 1895 -18.64 1896 -19.67 1897 -18.62 1898 -17.98 1899 -18.27 1900 -19.59 1901 -18.97 1902 -19.16 1903 -19.15 1904 -19.91 1905 -19.86 1906 -18.02 1907 -19.03 1908 -19.32 1909 -18.17 1910 -17.47 1911 -18.99 1912 -17.25 1913 -16.61 1914 -15.98 1915 -16.65 1916 -16.24 1917 -16.56 1918 -16.87 1919 -17.03 1920 -17.27 1921 -16.31 1922 -16.06 1923 -15.55 1924 -15.38 1925 -16.12 1926 -16.10 1927 -14.89 1928 -15.49 1929 -14.96 1930 -14.54 1931 -15.94 1932 -15.97 1933 -15.36 1934 -15.64 1935 -15.29 1936 -16.24 1937 -17.05 1938 -16.49 1939 -16.69 1940 -16.72 1941 -16.20 1942 -16.29 1943 -17.15 1944 -16.76 1945 -17.02 1946 -17.98 1947 -16.99 1948 -15.84 1949 -15.98 1950 -16.37 1951 -16.52 1952 -15.09 1953 -14.85 1954 -16.43 1955 -16.54 1956 -17.14 1957 -15.87 1958 -15.05 1959 -15.72 1960 -17.09 1961 -15.66 1962 -14.62 1963 -17.11 1964 -17.84 1965 -17.23 1966 -18.09 1967 -17.02 1968 -17.58 1969 -17.28 1970 -17.24 1971 -16.82 1972 -17.43 1973 -16.61 1974 -15.89 1975 -16.96 1976 -17.13 1977 -16.04 1978 -16.32 1979 -16.77 1980 -17.33 1981 -17.70 1982 -16.93 1983 -17.66 1984 -17.14 1985 -17.07 1986 -17.09 1987 -15.33 1988 -16.83 1989 -17.07 1990 -17.12 1991 -17.00 1992 -17.18 1993 -17.68 1994 -17.84 1995 -16.39 1996 -17.28 1997 -15.35 1998 -15.07