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 1.573 1822 1.573 1823 1.573 1824 1.573 1825 1.573 1826 1.573 1827 1.573 1828 1.573 1829 1.573 1830 1.573 1831 1.573 1832 1.573 1833 1.573 1834 1.572 1835 1.573 1836 1.573 1837 1.573 1838 1.573 1839 1.573 1840 1.573 1841 1.573 1842 1.573 1843 1.573 1844 1.573 1845 1.573 1846 1.573 1847 1.573 1848 1.573 1849 1.573 1850 1.573 1851 1.573 1852 1.573 1853 1.573 1854 1.573 1855 1.573 1856 1.573 1857 1.573 1858 1.573 1859 1.573 1860 1.573 1861 1.573 1862 1.573 1863 1.573 1864 1.573 1865 1.573 1866 1.573 1867 1.573 1868 1.573 1869 1.573 1870 1.573 1871 1.573 1872 1.573 1873 1.573 1874 1.573 1875 1.573 1876 1.573 1877 1.573 1878 1.573 1879 1.573 1880 1.573 1881 1.573 1882 1.573 1883 1.573 1884 1.573 1885 1.573 1886 1.573 1887 1.573 1888 1.573 1889 1.573 1890 1.573 1891 1.573 1892 1.573 1893 1.573 1894 1.573 1895 1.573 1896 1.573 1897 1.573 1898 1.573 1899 1.573 1900 1.573 1901 1.573 1902 1.573 1903 1.573 1904 1.573 1905 1.573 1906 1.573 1907 1.573 1908 1.573 1909 1.573 1910 1.573 1911 1.573 1912 1.573 1913 1.573 1914 1.794 1915 1.794 1916 1.794 1917 1.794 1918 1.794 1919 1.794 1920 1.794 1921 1.794 1922 1.794 1923 1.794 1924 1.794 1925 1.794 1926 1.794 1927 1.794 1928 1.794 1929 1.794 1930 1.794 1931 1.794 1932 1.794 1933 1.794 1934 1.794 1935 1.794 1936 1.794 1937 1.794 1938 1.794 1939 1.794 1940 1.794 1941 1.794 1942 1.794 1943 1.794 1944 1.794 1945 1.794 1946 1.794 1947 1.794 1948 1.794 1949 1.794 1950 1.794 1951 3.012 1952 3.122 1953 6.151 1954 0.4097 1955 5.838 1956 3.802 1957 -0.2458 1958 3.844 1959 3.277 1960 5.736 1961 4.297 1962 4.083 1963 4.373 1964 3.817 1965 6.757 1966 5.33 1967 6.898 1968 5.614 1969 3.887 1970 -1.326 1971 4.41 1972 4.089 1973 2.09 1974 0.314 1975 -3.866 1976 1.313 1977 1.479 1978 -4.102 1979 12.29 1980 3.29 1981 2.918 1982 0.6986 1983 7.147 1984 -3.03 1985 -12 1986 9.177 1987 13.44 1988 -0.00495 1989 -1.578 1990 0.6957 1991 11.16 1992 10.9 1993 12.89 1994 20.9 1995 2.292 1996 9.077 1997 7.801 1998 1.871 1999 0.0989 2000 -12.45 2001 8.669 2002 2.908 2003 -2.74 2004 1.363 2005 2.486 2006 -0.9395 2007 1.335 2008 -9.861 2009 3.796 2010 2.129 2011 8.62 2012 6.772 2013 1.04