1850 -0.326 1851 -0.16 1852 -0.098 1853 -0.169 1854 -0.064 1855 -0.175 1856 -0.37 1857 -0.401 1858 -0.394 1859 -0.211 1860 -0.351 1861 -0.265 1862 -0.631 1863 -0.187 1864 -0.493 1865 -0.241 1866 -0.192 1867 -0.327 1868 -0.121 1869 -0.127 1870 -0.193 1871 -0.387 1872 -0.195 1873 -0.302 1874 -0.286 1875 -0.534 1876 -0.349 1877 0.007 1878 0.183 1879 -0.233 1880 -0.241 1881 -0.251 1882 -0.242 1883 -0.356 1884 -0.464 1885 -0.363 1886 -0.332 1887 -0.351 1888 -0.266 1889 -0.135 1890 -0.365 1891 -0.296 1892 -0.465 1893 -0.544 1894 -0.377 1895 -0.377 1896 -0.161 1897 -0.148 1898 -0.284 1899 -0.218 1900 -0.081 1901 -0.14 1902 -0.384 1903 -0.404 1904 -0.498 1905 -0.35 1906 -0.224 1907 -0.5 1908 -0.475 1909 -0.471 1910 -0.424 1911 -0.436 1912 -0.48 1913 -0.464 1914 -0.257 1915 -0.151 1916 -0.4 1917 -0.511 1918 -0.368 1919 -0.379 1920 -0.285 1921 -0.103 1922 -0.254 1923 -0.225 1924 -0.224 1925 -0.118 1926 -0.013 1927 -0.116 1928 -0.144 1929 -0.31 1930 -0.01 1931 0.035 1932 -0.068 1933 -0.242 1934 -0.031 1935 -0.094 1936 -0.043 1937 0.074 1938 0.106 1939 0.034 1940 0.009 1941 0.031 1942 0.026 1943 0.104 1944 0.196 1945 0.022 1946 0.021 1947 0.014 1948 0.076 1949 -0.031 1950 -0.173 1951 0.048 1952 0.039 1953 0.198 1954 -0.063 1955 -0.089 1956 -0.261 1957 0.012 1958 0.116 1959 0.068 1960 0.009 1961 0.067 1962 0.095 1963 0.148 1964 -0.174 1965 -0.136 1966 -0.002 1967 0.024 1968 -0.064 1969 -0.059 1970 -0.058 1971 -0.194 1972 -0.226 1973 0.025 1974 -0.259 1975 -0.12 1976 -0.288 1977 0.034 1978 -0.057 1979 0.011 1980 0.071 1981 0.239 1982 -0.022 1983 0.173 1984 -0.081 1985 -0.129 1986 0.026 1987 0.148 1988 0.235 1989 0.164 1990 0.404 1991 0.313 1992 0.072 1993 0.124 1994 0.272 1995 0.473 1996 0.169 1997 0.461 1998 0.602 1999 0.398 2000 0.402 2001 0.552 2002 0.586 2003 0.634 2004 0.601 2005 0.719 2006 0.658 2007 0.702 2008 0.558 2009 0.576 2010 0.713 2011 0.542 2012 0.590 2013 0.623