1840 -0.31358 1841 -0.28506 1842 -0.26400 1843 -0.25275 1844 -0.26281 1845 -0.29733 1846 -0.34803 1847 -0.40502 1848 -0.46049 1849 -0.46917 1850 -0.42215 1851 -0.36804 1852 -0.35747 1853 -0.38179 1854 -0.38200 1855 -0.34881 1856 -0.28045 1857 -0.17532 1858 -0.03980 1859 0.08738 1860 0.19989 1861 0.31750 1862 0.45907 1863 0.62062 1864 0.78416 1865 0.94588 1866 1.10855 1867 1.27565 1868 1.43987 1869 1.56204 1870 1.63561 1871 1.70084 1872 1.79754 1873 1.92122 1874 2.04845 1875 2.17493 1876 2.29280 1877 2.39565 1878 2.48942 1879 2.60645 1880 2.75238 1881 2.89933 1882 3.01889 1883 3.11551 1884 3.21393 1885 3.31818 1886 3.39265 1887 3.40234 1888 3.35158 1889 3.27187 1890 3.17106 1891 3.04526 1892 2.88514 1893 2.70303 1894 2.58825 1895 2.55476 1896 2.58699 1897 2.67080 1898 2.80054 1899 2.94723 1900 3.10767 1901 3.22989 1902 3.25953 1903 3.19055 1904 2.99631 1905 2.67765 1906 2.31713 1907 1.99118 1908 1.68253 1909 1.30057 1910 0.83512 1911 0.40330 1912 0.11795 1913 -0.04132 1914 -0.18604 1915 -0.33520 1916 -0.46024 1917 -0.53171 1918 -0.56400 1919 -0.63160 1920 -0.74895 1921 -0.84970 1922 -0.86687 1923 -0.80900 1924 -0.72713 1925 -0.63451 1926 -0.60509 1927 -0.70745 1928 -0.92003 1929 -1.13315 1930 -1.33139 1931 -1.44669 1932 -1.41142 1933 -1.26076 1934 -1.18847 1935 -1.22807 1936 -1.33399 1937 -1.45595 1938 -1.57925 1939 -1.64438 1940 -1.64137 1941 -1.61491 1942 -1.61157 1943 -1.61845 1944 -1.54716 1945 -1.38285 1946 -1.25772 1947 -1.30049 1948 -1.46477 1949 -1.50052 1950 -1.36776 1951 -1.23704 1952 -1.28100 1953 -1.47778 1954 -1.67161 1955 -1.83479 1956 -1.92726 1957 -1.90978 1958 -1.79996 1959 -1.70083 1960 -1.63224 1961 -1.56142 1962 -1.45240 1963 -1.29982 1964 -1.08330 1965 -0.79693 1966 -0.53412 1967 -0.38766 1968 -0.33042 1969 -0.22214 1970 -0.04459 1971 0.12559 1972 0.21365 1973 0.21335 1974 0.10273 1975 -0.12343 1976 -0.36476 1977 -0.51892 1978 -0.58511 1979 -0.56300 1980 -0.44583 1981 -0.26840 1982 -0.06913 1983 0.12527 1984 0.14539 1985 -0.03574 1986 -0.25665 1987 -0.35684 1988 -0.34998 1989 -0.32168 1990 -0.29046