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 2.144 1822 2.144 1823 2.145 1824 2.144 1825 2.144 1826 2.145 1827 2.144 1828 2.145 1829 2.144 1830 2.145 1831 2.144 1832 2.144 1833 2.144 1834 2.144 1835 2.144 1836 2.144 1837 2.145 1838 2.144 1839 2.145 1840 2.144 1841 2.144 1842 2.144 1843 2.145 1844 2.144 1845 2.144 1846 2.144 1847 2.144 1848 2.144 1849 2.144 1850 2.144 1851 2.33 1852 2.33 1853 2.33 1854 2.33 1855 2.33 1856 2.33 1857 2.33 1858 2.33 1859 2.33 1860 2.33 1861 2.33 1862 2.33 1863 2.33 1864 2.33 1865 2.33 1866 2.33 1867 2.33 1868 2.33 1869 2.33 1870 2.33 1871 2.327 1872 2.327 1873 2.327 1874 2.327 1875 2.326 1876 2.327 1877 2.327 1878 2.327 1879 2.327 1880 2.327 1881 2.327 1882 2.327 1883 2.327 1884 2.327 1885 2.327 1886 2.327 1887 2.327 1888 2.327 1889 2.327 1890 2.327 1891 2.327 1892 2.327 1893 2.327 1894 2.327 1895 2.327 1896 2.327 1897 2.327 1898 2.327 1899 2.327 1900 2.327 1901 2.934 1902 3.02 1903 2.973 1904 3.052 1905 2.883 1906 2.96 1907 3.032 1908 2.985 1909 2.94 1910 3.005 1911 2.959 1912 3.02 1913 2.973 1914 3.028 1915 2.981 1916 2.936 1917 3.081 1918 2.94 1919 2.986 1920 3.029 1921 0.6867 1922 5.534 1923 4.728 1924 6.648 1925 -7.103 1926 18 1927 -11.56 1928 16.33 1929 0.8158 1930 2.52 1931 -9.713 1932 -9.019 1933 14.41 1934 4.075 1935 10.95 1936 -1.45 1937 10.4 1938 -6.274 1939 8.192 1940 9.588 1941 -1.284 1942 8.964 1943 10.07 1944 -4.799 1945 -3.228 1946 2.562 1947 27.01 1948 27.98 1949 -8.772 1950 -0.2964 1951 1.058 1952 6.685 1953 6.415 1954 0.5239 1955 4.551 1956 7.266 1957 4.815 1958 1.763 1959 4.183 1960 3.891 1961 3.398 1962 12.07 1963 4.369 1964 9.461 1965 5.289 1966 6.509 1967 5.014 1968 2.541 1969 2.617 1970 1.842 1971 4.353 1972 6.137 1973 4.516 1974 6.525 1975 5.148 1976 3.345 1977 5.291 1978 5.918 1979 -2.304 1980 -8.12 1981 -5.679 1982 -3.273 1983 1.019 1984 2.097 1985 1.978 1986 0.5256 1987 2.029 1988 1.327 1989 0.6379 1990 2.718 1991 2.63 1992 7.141 1993 6.149 1994 5.6 1995 5.542 1996 0.9165 1997 3.171 1998 2.504 1999 2.031 2000 0.7907 2001 0.2629 2002 0.7363 2003 0.3131 2004 0.3279 2005 1.36 2006 3.98 2007 3.778 2008 1.254 2009 -3.021 2010 1.501 2011 2.123 2012 1.878 2013 1.816