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 1822 0 1823 0 1824 0 1825 0 1826 0 1827 0 1828 0 1829 0 1830 0 1831 -3.504 1832 -3.504 1833 -3.504 1834 -3.504 1835 -3.504 1836 -3.504 1837 -3.503 1838 -3.504 1839 -3.504 1840 -3.504 1841 13.91 1842 13.91 1843 13.91 1844 13.91 1845 13.91 1846 13.91 1847 13.91 1848 13.91 1849 13.91 1850 13.91 1851 10.98 1852 10.98 1853 10.98 1854 10.98 1855 10.98 1856 10.98 1857 10.98 1858 10.98 1859 10.98 1860 10.98 1861 11.94 1862 11.94 1863 11.94 1864 11.94 1865 11.94 1866 11.94 1867 11.94 1868 11.94 1869 11.94 1870 11.94 1871 7.032 1872 16.77 1873 13.85 1874 9.91 1875 6.148 1876 5.019 1877 13.97 1878 11.29 1879 -11.59 1880 10.49 1881 4.154 1882 -0.2849 1883 -0.8571 1884 10.37 1885 -0.5222 1886 2.362 1887 2.308 1888 0 1889 5.263 1890 2.857 1891 0.6944 1892 3.678 1893 2.439 1894 -3.247 1895 3.579 1896 11.45 1897 1.163 1898 2.874 1899 3.352 1900 8.108 1901 0.3333 1902 7.641 1903 9.414 1904 -0.4231 1905 9.207 1906 9.468 1907 6.043 1908 -6.927 1909 1.441 1910 13.73 1911 5.515 1912 -2.959 1913 1.626 1914 2.6 1915 0.4873 1916 -0.7759 1917 -2.444 1918 -1.603 1919 11.2 1920 10.9 1921 -6.606 1922 -3.448 1923 8.059 1924 1.78 1925 5.329 1926 -5.296 1927 -2.838 1928 11.08 1929 3.558 1930 -4.332 1931 -8.509 1932 -2.474 1933 6.649 1934 5.004 1935 4.688 1936 18.58 1937 5.412 1938 7.045 1939 1.394 1940 -1.925 1941 -3.141 1942 11 1943 2.087 1944 0.4088 1945 2.952 1946 7.711 1947 11.93 1948 -9.922 1949 10.79 1950 14.66 1951 -7.601 1952 4.212 1953 3.161 1954 13.93 1955 2.079 1956 5.416 1957 2.626 1958 3.659 1959 7.019 1960 0.3746 1961 5.202 1962 2.059 1963 6.373 1964 4.89 1965 6.295 1966 6.056 1967 -4.731 1968 -0.03326 1969 10.65 1970 -1.259 1971 5.376 1972 4.461 1973 6.973 1974 5.487 1975 -1.747 1976 2.129 1977 -4.79 1978 0.5863 1979 2.288 1980 0.8728 1981 4.955 1982 1.829 1983 2.495 1984 4.75 1985 0.963 1986 2.463 1987 0.7626 1988 -0.04119 1989 1.425 1990 0.3049 1991 -1.025 1992 1.561 1993 7.149 1994 5.747 1995 4.174 1996 3.121 1997 0.8704 1998 0.00028 1999 4.825 2000 2.026 2001 3.723 2002 4.863 2003 3.841 2004 4.064 2005 2.241 2006 3.058 2007 3.596 2008 -0.6855 2009 -1.733 2010 1.628 2011 1.676 2012 3.001 2013 2.521