Year Total 1801 0.01088 1802 0.0108 1803 0.0108 1804 0.01088 1805 0.0108 1806 0.0108 1807 0.01087 1808 0.0108 1809 0.0108 1810 0.01087 1811 0.01079 1812 0.01087 1813 0.01079 1814 0.01087 1815 0.01079 1816 0.01086 1817 0.01079 1818 0.01086 1819 0.01078 1820 0.01086 1821 1.656 1822 1.656 1823 1.656 1824 1.656 1825 1.656 1826 1.656 1827 1.656 1828 1.656 1829 1.656 1830 1.656 1831 1.656 1832 1.656 1833 1.656 1834 1.656 1835 1.656 1836 1.656 1837 1.656 1838 1.656 1839 1.656 1840 1.656 1841 1.656 1842 1.656 1843 1.656 1844 1.656 1845 1.656 1846 1.656 1847 1.656 1848 1.656 1849 1.656 1850 1.656 1851 1.582 1852 1.582 1853 1.582 1854 1.582 1855 1.582 1856 1.582 1857 1.582 1858 1.582 1859 1.582 1860 1.582 1861 1.582 1862 1.582 1863 1.582 1864 1.582 1865 1.582 1866 1.582 1867 1.582 1868 1.582 1869 1.582 1870 1.582 1871 1.509 1872 1.509 1873 1.509 1874 1.509 1875 1.509 1876 1.509 1877 1.509 1878 1.509 1879 1.509 1880 1.509 1881 1.509 1882 1.509 1883 1.509 1884 1.509 1885 1.509 1886 1.509 1887 1.509 1888 1.509 1889 1.509 1890 1.509 1891 0.8585 1892 0.8585 1893 0.8585 1894 0.8585 1895 0.8585 1896 0.8585 1897 9.307 1898 6.481 1899 5.553 1900 5.303 1901 7.314 1902 5.475 1903 6.78 1904 3.373 1905 7.326 1906 7.988 1907 6.266 1908 1.896 1909 1.682 1910 1.73 1911 2.144 1912 3.522 1913 3.333 1914 -0.6089 1915 8.623 1916 10.36 1917 3.691 1918 0.6024 1919 3.321 1920 1.001 1921 4.138 1922 8.616 1923 6.887 1924 9.42 1925 2.642 1926 10.15 1927 1.767 1928 6.454 1929 10.45 1930 -11.46 1931 -8.087 1932 -3.832 1933 11.25 1934 13.54 1935 9.377 1936 4.799 1937 1.355 1938 1.574 1939 0.5414 1940 1.939 1941 0.09752 1942 -2.29 1943 1.579 1944 8.581 1945 3.706 1946 3.85 1947 2.812 1948 3.307 1949 7.541 1950 7.863 1951 7.716 1952 5.155 1953 6.358 1954 2.8 1955 7.433 1956 4.514 1957 4.88 1958 0.3099 1959 0.521 1960 13.83 1961 8.888 1962 7.463 1963 4.636 1964 6.97 1965 6.731 1966 8.435 1967 3.986 1968 -1.072 1969 2.567 1970 7.794 1971 4.468 1972 3.182 1973 5.248 1974 5.262 1975 7.934 1976 1.444 1977 0.00154 1978 0.03224 1979 5.982 1980 4.589 1981 4.419 1982 0.4574 1983 -13.24 1984 4.707 1985 2.033 1986 10.08 1987 8.619 1988 -8.185 1989 -12.21 1990 -5.135 1991 2.393 1992 -1.054 1993 5.492 1994 13.35 1995 8.376 1996 2.146 1997 8.496 1998 0.04935 1999 0.8726 2000 3.049 2001 0.07747 2002 4.78 2003 3.768 2004 2.988 2005 6.166 2006 7.283 2007 7.812 2008 9.271 2009 0.3768 2010 8.296 2011 6.452 2012 5.849 2013 4.606