Year Total 1801 0 1802 0 1803 0 1804 0 1805 0 1806 0 1807 0 1808 0 1809 0 1810 0 1811 0 1812 0 1813 0 1814 0 1815 0 1816 0 1817 0 1818 0 1819 0 1820 0 1821 1.145 1822 1.145 1823 1.145 1824 1.145 1825 1.145 1826 1.145 1827 1.145 1828 1.145 1829 1.145 1830 1.145 1831 1.145 1832 1.145 1833 1.145 1834 1.145 1835 1.145 1836 1.145 1837 1.145 1838 1.145 1839 1.145 1840 1.145 1841 1.145 1842 1.145 1843 1.145 1844 1.145 1845 1.145 1846 1.145 1847 1.145 1848 1.145 1849 1.145 1850 1.145 1851 1.145 1852 1.145 1853 1.145 1854 1.145 1855 1.145 1856 1.145 1857 1.145 1858 1.145 1859 1.145 1860 1.145 1861 1.145 1862 1.145 1863 1.145 1864 1.145 1865 1.145 1866 1.145 1867 1.145 1868 1.145 1869 1.145 1870 1.145 1871 1.145 1872 1.145 1873 1.145 1874 1.145 1875 1.145 1876 1.145 1877 1.145 1878 1.145 1879 1.145 1880 1.145 1881 1.145 1882 1.145 1883 1.145 1884 1.145 1885 1.145 1886 1.145 1887 1.145 1888 1.145 1889 1.145 1890 1.145 1891 1.145 1892 1.145 1893 1.145 1894 1.145 1895 1.145 1896 1.145 1897 1.145 1898 1.145 1899 1.145 1900 1.145 1901 1.145 1902 1.145 1903 1.145 1904 1.145 1905 1.145 1906 1.145 1907 1.145 1908 1.145 1909 1.145 1910 1.145 1911 1.145 1912 1.145 1913 1.145 1914 2.784 1915 2.785 1916 2.784 1917 2.785 1918 2.784 1919 2.784 1920 2.785 1921 2.784 1922 2.784 1923 2.785 1924 2.784 1925 2.784 1926 2.785 1927 2.784 1928 2.784 1929 2.784 1930 2.785 1931 2.785 1932 2.785 1933 2.784 1934 2.784 1935 2.784 1936 2.784 1937 2.785 1938 2.784 1939 2.784 1940 2.785 1941 2.784 1942 2.785 1943 2.785 1944 2.784 1945 2.784 1946 2.785 1947 2.784 1948 2.784 1949 2.785 1950 2.784 1951 3.795 1952 3.759 1953 3.754 1954 3.858 1955 3.96 1956 3.966 1957 4.043 1958 4.083 1959 4.029 1960 2.437 1961 4.856 1962 3.625 1963 4.179 1964 2.379 1965 3.758 1966 2.895 1967 -0.9265 1968 6.749 1969 -6.235 1970 8.822 1971 0.05875 1972 6.68 1973 -5.422 1974 4.206 1975 8.026 1976 9.363 1977 -3.32 1978 -4.648 1979 6.258 1980 -3.88 1981 -1.24 1982 14.76 1983 2.266 1984 -4.814 1985 3.638 1986 4.73 1987 4.037 1988 5.103 1989 -1.686 1990 4.573 1991 -0.3319 1992 2.359 1993 -2.04 1994 2.995 1995 5.16 1996 4.929 1997 4.821 1998 5.515 1999 4.952 2000 5.737 2001 4.736 2002 1.217 2003 6.816 2004 6.058 2005 5.597 2006 2.443 2007 4.957 2008 3.682 2009 2.166 2010 4.279 2011 2.617 2012 3.182 2013 3.751