1850 -0.374 1851 -0.365 1852 -0.358 1853 -0.358 1854 -0.367 1855 -0.385 1856 -0.409 1857 -0.432 1858 -0.452 1859 -0.465 1860 -0.473 1861 -0.471 1862 -0.458 1863 -0.432 1864 -0.396 1865 -0.356 1866 -0.32 1867 -0.291 1868 -0.273 1869 -0.265 1870 -0.267 1871 -0.275 1872 -0.285 1873 -0.289 1874 -0.28 1875 -0.255 1876 -0.22 1877 -0.187 1878 -0.168 1879 -0.169 1880 -0.185 1881 -0.21 1882 -0.235 1883 -0.257 1884 -0.273 1885 -0.282 1886 -0.285 1887 -0.285 1888 -0.287 1889 -0.297 1890 -0.314 1891 -0.333 1892 -0.346 1893 -0.345 1894 -0.33 1895 -0.307 1896 -0.283 1897 -0.266 1898 -0.26 1899 -0.266 1900 -0.283 1901 -0.311 1902 -0.342 1903 -0.37 1904 -0.39 1905 -0.406 1906 -0.424 1907 -0.448 1908 -0.475 1909 -0.497 1910 -0.504 1911 -0.493 1912 -0.468 1913 -0.438 1914 -0.414 1915 -0.4 1916 -0.395 1917 -0.392 1918 -0.385 1919 -0.373 1920 -0.358 1921 -0.345 1922 -0.333 1923 -0.32 1924 -0.305 1925 -0.288 1926 -0.272 1927 -0.26 1928 -0.25 1929 -0.241 1930 -0.232 1931 -0.224 1932 -0.218 1933 -0.209 1934 -0.192 1935 -0.165 1936 -0.129 1937 -0.09 1938 -0.055 1939 -0.027 1940 -0.011 1941 -0.005 1942 -0.01 1943 -0.026 1944 -0.053 1945 -0.09 1946 -0.132 1947 -0.17 1948 -0.198 1949 -0.209 1950 -0.206 1951 -0.195 1952 -0.185 1953 -0.183 1954 -0.185 1955 -0.185 1956 -0.175 1957 -0.155 1958 -0.131 1959 -0.11 1960 -0.1 1961 -0.1 1962 -0.112 1963 -0.13 1964 -0.148 1965 -0.156 1966 -0.152 1967 -0.138 1968 -0.119 1969 -0.103 1970 -0.092 1971 -0.088 1972 -0.09 1973 -0.095 1974 -0.098 1975 -0.093 1976 -0.076 1977 -0.046 1978 -0.011 1979 0.023 1980 0.049 1981 0.064 1982 0.068 1983 0.066 1984 0.064 1985 0.068 1986 0.082 1987 0.102 1988 0.124 1989 0.14 1990 0.149 1991 0.152 1992 0.156 1993 0.166 1994 0.188 1995 0.219 1996 0.255 1997 0.289 1998 0.317 1999 0.339 2000 0.36 2001 0.381 2002 0.403 2003 0.423 2004 0.437 2005 0.446 2006 0.451 2007 0.455