Year Total 1801 0.03904 1802 0.03904 1803 0.03904 1804 0.03904 1805 0.03904 1806 0.03904 1807 0.03904 1808 0.03904 1809 0.03904 1810 0.03904 1811 0.03904 1812 0.03904 1813 0.03904 1814 0.03904 1815 0.03904 1816 0.03904 1817 0.03904 1818 0.03904 1819 0.03904 1820 0.03904 1821 1.493 1822 1.493 1823 1.493 1824 1.493 1825 1.493 1826 1.493 1827 1.493 1828 1.493 1829 1.493 1830 1.493 1831 1.493 1832 1.493 1833 1.493 1834 1.493 1835 1.493 1836 1.493 1837 1.493 1838 1.493 1839 1.493 1840 1.493 1841 1.493 1842 1.493 1843 1.493 1844 1.493 1845 1.493 1846 1.493 1847 1.493 1848 1.493 1849 1.493 1850 1.493 1851 1.493 1852 1.493 1853 1.493 1854 1.493 1855 1.493 1856 1.493 1857 1.493 1858 1.493 1859 1.493 1860 1.493 1861 1.493 1862 1.493 1863 1.493 1864 1.493 1865 1.493 1866 1.493 1867 1.493 1868 1.493 1869 1.493 1870 1.493 1871 1.493 1872 1.493 1873 1.493 1874 1.493 1875 1.493 1876 1.493 1877 1.493 1878 1.493 1879 1.493 1880 1.493 1881 1.493 1882 1.493 1883 1.493 1884 1.493 1885 1.493 1886 -3.041 1887 17.93 1888 -2.982 1889 -6.221 1890 0.4392 1891 -7.62 1892 10.41 1893 14.29 1894 14.67 1895 -6.672 1896 11.08 1897 -0.8337 1898 3.537 1899 7.02 1900 -1.313 1901 3.371 1902 9.594 1903 -6.104 1904 11.53 1905 -10.73 1906 -3.608 1907 -3.089 1908 10.14 1909 4.71 1910 7.616 1911 -6.821 1912 8.969 1913 5.951 1914 -3.692 1915 3.798 1916 -10.33 1917 -11.45 1918 -38.26 1919 -13.05 1920 1.263 1921 -7.686 1922 17.07 1923 16.16 1924 27.77 1925 26.03 1926 13.24 1927 5.06 1928 6.058 1929 2.027 1930 5.407 1931 1.768 1932 -0.702 1933 4.647 1934 10.11 1935 15.31 1936 7.714 1937 9.222 1938 0.5702 1939 4.939 1940 -3.346 1941 -1.038 1942 -1.038 1943 -1.038 1944 -1.038 1945 -1.038 1946 -1.038 1947 12.06 1948 13.94 1949 10.15 1950 9.243 1951 -1.666 1952 4.502 1953 2.693 1954 3.458 1955 7.243 1956 8.438 1957 1.131 1958 6.635 1959 -1.895 1960 8.596 1961 4.936 1962 2.041 1963 -2.805 1964 12.48 1965 5.436 1966 4.735 1967 4.381 1968 5.876 1969 1.417 1970 7.646 1971 2.486 1972 0.3189 1973 8.128 1974 3.739 1975 1.083 1976 5.527 1977 3.176 1978 3.353 1979 0.3951 1980 1.054 1981 1.883 1982 3.459 1983 4.189 1984 2.153 1985 1.783 1986 5.005 1987 2.151 1988 2.982 1989 2.569 1990 -1.64 1991 -1.445 1992 -10.02 1993 -8.057 1994 -12 1995 -10.7 1996 2.454 1997 11.01 1998 8.003 1999 3.011 2000 5.439 2001 4.367 2002 4.663 2003 6.449 2004 11.01 2005 8.885 2006 9.874 2007 8.375 2008 11.74 2009 -0.1518 2010 7.502 2011 5.676 2012 1.563 2013 0.6013