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 0.8686 1822 0.8686 1823 0.8686 1824 0.8686 1825 0.8686 1826 0.8686 1827 0.8686 1828 0.8686 1829 0.8686 1830 0.8686 1831 0.8686 1832 0.8686 1833 0.8686 1834 0.8686 1835 0.8686 1836 0.8686 1837 0.8686 1838 0.8686 1839 0.8686 1840 0.8686 1841 0.8686 1842 0.8686 1843 0.8686 1844 0.8686 1845 0.8686 1846 0.8686 1847 0.8686 1848 0.8686 1849 0.8686 1850 0.8686 1851 0.8686 1852 0.8686 1853 0.8686 1854 0.8686 1855 0.8686 1856 0.8686 1857 0.8686 1858 0.8686 1859 0.8686 1860 0.8686 1861 0.8686 1862 0.8686 1863 0.8686 1864 0.8686 1865 0.8686 1866 0.8686 1867 0.8686 1868 0.8686 1869 0.8686 1870 0.8686 1871 2.286 1872 2.286 1873 2.286 1874 2.286 1875 2.286 1876 2.286 1877 2.286 1878 2.286 1879 2.286 1880 2.286 1881 2.286 1882 2.286 1883 2.286 1884 2.286 1885 2.286 1886 2.286 1887 2.286 1888 2.286 1889 2.286 1890 2.286 1891 2.286 1892 2.286 1893 2.286 1894 2.286 1895 2.286 1896 2.286 1897 2.286 1898 2.286 1899 2.286 1900 2.286 1901 2.286 1902 2.286 1903 2.286 1904 2.286 1905 2.286 1906 2.286 1907 2.286 1908 2.286 1909 2.286 1910 2.286 1911 2.286 1912 2.286 1913 2.286 1914 0.7588 1915 0.7588 1916 0.7588 1917 0.7588 1918 0.7588 1919 0.7588 1920 0.7588 1921 0.7588 1922 0.7588 1923 0.7588 1924 0.7588 1925 0.7588 1926 0.7588 1927 0.7588 1928 0.7588 1929 0.7588 1930 0.7588 1931 0.7588 1932 0.7588 1933 0.7588 1934 0.7588 1935 0.7588 1936 0.7588 1937 0.7588 1938 0.7588 1939 0.7588 1940 0.7588 1941 0.7588 1942 0.7588 1943 0.7588 1944 0.7588 1945 0.7588 1946 0.7588 1947 0.7588 1948 0.7588 1949 0.7588 1950 0.7588 1951 4.791 1952 4.659 1953 4.806 1954 4.983 1955 4.699 1956 4.076 1957 3.865 1958 3.596 1959 3.266 1960 3.427 1961 4.166 1962 11.8 1963 2.233 1964 4.082 1965 0.4024 1966 0.4463 1967 -12.89 1968 -1.968 1969 8.19 1970 1.764 1971 4.945 1972 8.758 1973 6.504 1974 -4.397 1975 -7.701 1976 15.9 1977 2.613 1978 -0.07319 1979 0.243 1980 -3.065 1981 3.318 1982 8.061 1983 5.529 1984 9 1985 5.993 1986 2.82 1987 3.544 1988 5.948 1989 4.212 1990 5.078 1991 5.934 1992 8.938 1993 8.268 1994 8.915 1995 9.543 1996 9.248 1997 7.986 1998 5.58 1999 4.605 2000 6.65 2001 6.809 2002 7.036 2003 7.258 2004 7.824 2005 8.439 2006 8.054 2007 8.372 2008 6.218 2009 5.223 2010 6.668 2011 5.754 2012 5.255 2013 5.406