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 -0.8579 1822 -0.8579 1823 -0.8576 1824 -0.8579 1825 -0.8579 1826 -0.8579 1827 -0.8579 1828 -0.8576 1829 -0.8579 1830 -0.8579 1831 -0.8576 1832 -0.8579 1833 -0.8579 1834 -0.8579 1835 -0.8577 1836 -0.8579 1837 -0.8579 1838 -0.8577 1839 -0.8579 1840 -0.8577 1841 -0.8579 1842 -0.8579 1843 -0.8577 1844 -0.8579 1845 -0.8577 1846 -0.8579 1847 -0.8577 1848 -0.8579 1849 -0.8577 1850 -0.8579 1851 1.042 1852 1.042 1853 1.042 1854 1.042 1855 1.042 1856 1.042 1857 1.042 1858 1.042 1859 1.042 1860 1.042 1861 1.042 1862 1.042 1863 1.042 1864 1.042 1865 1.042 1866 1.042 1867 1.042 1868 1.042 1869 1.042 1870 1.042 1871 1.531 1872 1.531 1873 1.531 1874 1.531 1875 1.532 1876 1.531 1877 1.531 1878 1.531 1879 1.531 1880 1.532 1881 1.531 1882 1.531 1883 1.531 1884 1.531 1885 1.531 1886 1.531 1887 1.531 1888 1.531 1889 1.531 1890 1.531 1891 1.531 1892 1.531 1893 1.531 1894 1.531 1895 1.531 1896 1.531 1897 1.531 1898 1.531 1899 1.531 1900 1.531 1901 1.412 1902 1.538 1903 1.387 1904 1.51 1905 1.495 1906 1.481 1907 1.467 1908 1.454 1909 1.441 1910 1.428 1911 1.539 1912 1.402 1913 1.511 1914 2.261 1915 2.138 1916 2.259 1917 2.137 1918 2.257 1919 2.135 1920 2.254 1921 2.492 1922 4.147 1923 3.287 1924 2.925 1925 3.028 1926 4.135 1927 3.649 1928 4.05 1929 3.9 1930 4.378 1931 4.925 1932 4.053 1933 3.912 1934 3.402 1935 3.288 1936 3.452 1937 2.978 1938 3.769 1939 2.355 1940 1.711 1941 1.433 1942 1.899 1943 18 1944 13.69 1945 13.41 1946 15.64 1947 -6.259 1948 -2.612 1949 -2.57 1950 -2.258 1951 9.003 1952 8.833 1953 14.58 1954 11.68 1955 10.24 1956 9.674 1957 13.88 1958 0.5986 1959 4.496 1960 5.699 1961 3.292 1962 2.362 1963 2.979 1964 7.039 1965 7.264 1966 3.256 1967 2.76 1968 4.475 1969 7.216 1970 12 1971 0.2308 1972 2.989 1973 8.756 1974 -3.944 1975 -0.2649 1976 -6.176 1977 -2.106 1978 0.7234 1979 -1.899 1980 -5.202 1981 2.846 1982 1.215 1983 3.646 1984 0.3386 1985 -3.709 1986 2.344 1987 8.21 1988 3.186 1989 6.968 1990 5.578 1991 0.5038 1992 2.4 1993 1.406 1994 1.558 1995 1.271 1996 -1.853 1997 -1.708 1998 -0.5708 1999 -0.2365 2000 1 2001 1.661 2002 0.9317 2003 2.174 2004 0.7238 2005 1.176 2006 2.857 2007 1.42 2008 -0.8221 2009 -3.102 2010 -1.465 2011 1.476 2012 -0.6312 2013 0.3337