Year Total 1801 -0.01224 1802 -0.02448 1803 -0.01224 1804 -0.02449 1805 -0.01225 1806 -0.01225 1807 -0.0245 1808 -0.01225 1809 -0.02451 1810 -0.01226 1811 -0.01226 1812 -0.02452 1813 -0.01227 1814 -0.02453 1815 -0.01227 1816 -0.01227 1817 -0.02455 1818 -0.01228 1819 -0.02455 1820 -0.01228 1821 0.3124 1822 0.3001 1823 0.3124 1824 0.3001 1825 0.3124 1826 0.3124 1827 0.3001 1828 0.3124 1829 0.3001 1830 0.3124 1831 0.3124 1832 0.3001 1833 0.3124 1834 0.3 1835 0.3124 1836 0.3124 1837 0.3 1838 0.3124 1839 0.3 1840 0.3124 1841 0.3124 1842 0.3 1843 0.3124 1844 0.3 1845 0.3124 1846 0.3124 1847 0.3 1848 0.3124 1849 0.3 1850 0.3124 1851 -0.3812 1852 -0.3738 1853 -0.3787 1854 -0.3836 1855 -0.3759 1856 -0.368 1857 -0.3858 1858 -0.3778 1859 -0.3697 1860 -0.3877 1861 -0.3795 1862 -0.3711 1863 -0.376 1864 -0.3809 1865 -0.3722 1866 -0.3771 1867 -0.3821 1868 -0.3871 1869 -0.364 1870 -0.383 1871 -0.3737 1872 -0.3786 1873 -0.3836 1874 -0.3741 1875 -0.379 1876 -0.384 1877 -0.3741 1878 -0.379 1879 -0.384 1880 -0.3739 1881 -0.3788 1882 -0.3683 1883 -0.3886 1884 -0.3781 1885 -0.3674 1886 -0.388 1887 -0.3772 1888 -0.366 1889 -0.387 1890 -0.3758 1891 -0.3807 1892 -0.3692 1893 -0.3907 1894 -0.3791 1895 -0.3672 1896 -0.372 1897 -0.3939 1898 -0.3647 1899 -0.3868 1900 -0.3744 1901 2.419 1902 2.411 1903 2.419 1904 2.409 1905 2.416 1906 2.42 1907 2.409 1908 2.412 1909 2.414 1910 2.415 1911 2.416 1912 2.415 1913 1.644 1914 5.742 1915 5.753 1916 5.762 1917 5.745 1918 5.754 1919 5.749 1920 5.758 1921 6.604 1922 6.621 1923 6.611 1924 6.601 1925 6.614 1926 6.614 1927 6.602 1928 6.611 1929 6.608 1930 6.615 1931 7.164 1932 7.163 1933 7.16 1934 7.166 1935 7.16 1936 7.161 1937 7.161 1938 7.158 1939 7.163 1940 7.165 1941 8.386 1942 8.393 1943 8.387 1944 8.39 1945 8.387 1946 8.392 1947 8.385 1948 8.392 1949 8.387 1950 8.388 1951 3.373 1952 2.749 1953 2.194 1954 1.74 1955 1.404 1956 1.25 1957 1.306 1958 1.606 1959 2.185 1960 2.956 1961 3.822 1962 4.586 1963 5.081 1964 5.219 1965 5.114 1966 4.968 1967 4.858 1968 4.661 1969 4.396 1970 4.091 1971 3.799 1972 3.545 1973 3.326 1974 1.821 1975 1.707 1976 1.564 1977 1.489 1978 1.642 1979 2.088 1980 2.72 1981 3.372 1982 3.899 1983 4.245 1984 4.356 1985 4.307 1986 4.232 1987 4.152 1988 3.978 1989 3.715 1990 3.398 1991 4.564 1992 4.264 1993 4.008 1994 3.816 1995 3.673 1996 3.533 1997 3.407 1998 3.336 1999 3.328 2000 3.366 2001 3.425 2002 7.352 2003 7.377 2004 7.36 2005 7.316 2006 19.46 2007 19.43