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 0.9569 1822 0.9569 1823 0.9569 1824 0.9569 1825 0.9569 1826 0.957 1827 0.9569 1828 0.957 1829 0.9569 1830 0.957 1831 0.9569 1832 0.9569 1833 0.957 1834 0.9569 1835 0.9569 1836 0.9569 1837 0.957 1838 0.9569 1839 0.957 1840 0.9568 1841 0.957 1842 0.957 1843 0.9569 1844 0.9569 1845 0.9569 1846 0.957 1847 0.9569 1848 0.9569 1849 0.9569 1850 0.957 1851 0.9569 1852 0.957 1853 0.9569 1854 0.9569 1855 0.957 1856 0.9569 1857 0.9569 1858 0.957 1859 0.9569 1860 0.957 1861 0.9569 1862 0.957 1863 0.9569 1864 0.9569 1865 0.9569 1866 0.9569 1867 0.957 1868 0.9569 1869 0.9569 1870 0.9569 1871 0.957 1872 0.9569 1873 0.9569 1874 0.957 1875 0.9568 1876 0.9569 1877 0.957 1878 0.9569 1879 0.9569 1880 0.9569 1881 0.9569 1882 0.9569 1883 0.9569 1884 0.9569 1885 0.9569 1886 0.957 1887 0.957 1888 0.9569 1889 0.957 1890 0.9569 1891 0.9569 1892 0.957 1893 0.9569 1894 0.9569 1895 0.9569 1896 0.957 1897 0.9569 1898 0.9569 1899 0.957 1900 0.9569 1901 0.957 1902 0.9569 1903 0.9569 1904 0.957 1905 0.9569 1906 0.957 1907 0.957 1908 0.9569 1909 0.9569 1910 0.9569 1911 0.9569 1912 0.9569 1913 0.9569 1914 1.241 1915 1.241 1916 1.241 1917 1.241 1918 1.241 1919 1.241 1920 1.241 1921 1.241 1922 1.241 1923 1.241 1924 1.241 1925 1.241 1926 1.241 1927 1.241 1928 1.241 1929 1.241 1930 1.241 1931 1.241 1932 1.241 1933 1.241 1934 1.241 1935 1.241 1936 1.241 1937 1.241 1938 1.241 1939 1.241 1940 1.241 1941 1.241 1942 1.241 1943 1.241 1944 1.241 1945 1.241 1946 1.241 1947 1.241 1948 1.241 1949 1.241 1950 1.241 1951 2.704 1952 2.722 1953 2.753 1954 2.796 1955 2.847 1956 2.903 1957 2.962 1958 3.023 1959 3.084 1960 3.146 1961 6.114 1962 6.311 1963 4.028 1964 8.557 1965 10.3 1966 5.888 1967 4.187 1968 4.543 1969 8.56 1970 11.25 1971 6.785 1972 6.211 1973 7.154 1974 3.231 1975 -0.287 1976 -2.821 1977 1.409 1978 9.122 1979 2.297 1980 -1.946 1981 -0.00377 1982 0.5386 1983 3.336 1984 -0.3069 1985 4 1986 4.647 1987 2.685 1988 2.797 1989 -1.539 1990 -3.129 1991 9.422 1992 13.73 1993 18.09 1994 5.846 1995 -3.394 1996 7.655 1997 -3.959 1998 -3.808 1999 1.833 2000 -2.497 2001 -0.1054 2002 -0.1204 2003 2.243 2004 2.859 2005 3.573 2006 2.388 2007 7.241 2008 6.69 2009 6.191 2010 7.371 2011 10.81 2012 7.845 2013 4.269