Year Total 1801 0.0236 1802 0.0236 1803 0.0236 1804 0.0236 1805 0.0236 1806 0.0236 1807 0.0236 1808 0.0236 1809 0.0236 1810 0.0236 1811 0.0236 1812 0.0236 1813 0.0236 1814 0.0236 1815 0.0236 1816 0.0236 1817 0.0236 1818 0.0236 1819 0.0236 1820 0.0236 1821 0.5822 1822 0.5822 1823 0.5822 1824 0.5822 1825 0.5822 1826 0.5822 1827 0.5822 1828 0.5822 1829 0.5822 1830 0.5822 1831 0.5822 1832 0.5822 1833 0.5822 1834 0.5822 1835 0.5822 1836 0.5822 1837 0.5822 1838 0.5822 1839 0.5822 1840 0.5822 1841 0.5822 1842 0.5822 1843 0.5822 1844 0.5822 1845 0.5822 1846 0.5822 1847 0.5822 1848 0.5822 1849 0.5822 1850 0.5822 1851 1.409 1852 1.409 1853 1.409 1854 1.409 1855 1.409 1856 1.409 1857 1.409 1858 1.409 1859 1.409 1860 1.409 1861 1.64 1862 1.64 1863 1.64 1864 1.641 1865 1.64 1866 1.64 1867 1.641 1868 1.64 1869 1.641 1870 1.64 1871 1.641 1872 1.641 1873 1.64 1874 1.64 1875 1.64 1876 1.641 1877 1.64 1878 1.786 1879 1.79 1880 1.795 1881 1.801 1882 1.805 1883 1.811 1884 1.816 1885 1.821 1886 1.826 1887 1.832 1888 1.838 1889 1.797 1890 1.802 1891 1.806 1892 1.811 1893 1.816 1894 1.848 1895 1.851 1896 1.882 1897 1.885 1898 1.956 1899 1.959 1900 1.962 1901 1.965 1902 1.967 1903 1.97 1904 1.973 1905 1.976 1906 1.98 1907 1.983 1908 1.986 1909 1.989 1910 1.992 1911 3.432 1912 2.002 1913 2.005 1914 3.959 1915 0.8527 1916 0.8525 1917 0.8527 1918 0.8526 1919 4.759 1920 4.759 1921 4.759 1922 4.759 1923 5.463 1924 5.463 1925 5.463 1926 5.462 1927 5.463 1928 5.462 1929 5.463 1930 5.463 1931 5.463 1932 6.532 1933 8.869 1934 8.717 1935 10.68 1936 6.834 1937 5.353 1938 5.005 1939 8.007 1940 5.997 1941 5.501 1942 5.22 1943 5.947 1944 6.117 1945 6.353 1946 6.551 1947 6.37 1948 6.37 1949 6.37 1950 6.37 1951 20.7 1952 2.785 1953 2.355 1954 22.66 1955 15.26 1956 8.978 1957 7.58 1958 6.838 1959 13.66 1960 7.594 1961 11.47 1962 9.782 1963 10.5 1964 9.698 1965 9.457 1966 1.389 1967 2.876 1968 15.54 1969 12.39 1970 7.709 1971 10.82 1972 12.41 1973 5.223 1974 7.343 1975 4.264 1976 1.954 1977 0.3914 1978 5.026 1979 6.074 1980 6.556 1981 5.345 1982 2.082 1983 3.458 1984 0.5738 1985 3.363 1986 4.876 1987 7.222 1988 2.167 1989 1.333 1990 5.329 1991 3.449 1992 6.559 1993 4.581 1994 9.819 1995 7.769 1996 5.453 1997 3.878 1998 3.446 1999 3.271 2000 9.268 2001 -0.1089 2002 -0.3467 2003 2.631 2004 5.747 2005 6.136 2006 5.798 2007 6.149 2008 4.404 2009 1.282 2010 4.951 2011 4.337 2012 2.899 2013 2.738