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 1.497 1822 1.498 1823 1.497 1824 1.497 1825 1.498 1826 1.496 1827 1.498 1828 1.497 1829 1.497 1830 1.498 1831 1.497 1832 1.497 1833 1.498 1834 1.497 1835 1.497 1836 1.498 1837 1.497 1838 1.497 1839 1.497 1840 1.498 1841 1.497 1842 1.497 1843 1.497 1844 1.498 1845 1.498 1846 1.496 1847 1.497 1848 1.497 1849 1.498 1850 1.497 1851 2.755 1852 2.756 1853 2.756 1854 2.756 1855 2.755 1856 2.756 1857 2.755 1858 2.756 1859 2.756 1860 2.756 1861 2.756 1862 2.755 1863 2.756 1864 2.755 1865 2.756 1866 2.756 1867 2.756 1868 2.755 1869 2.755 1870 2.756 1871 3.145 1872 3.145 1873 3.145 1874 3.144 1875 3.145 1876 3.145 1877 3.145 1878 3.144 1879 3.145 1880 3.144 1881 3.145 1882 3.145 1883 3.145 1884 3.144 1885 3.144 1886 3.145 1887 3.145 1888 3.145 1889 3.145 1890 3.144 1891 3.145 1892 3.145 1893 3.144 1894 3.145 1895 3.145 1896 3.145 1897 3.145 1898 3.145 1899 3.145 1900 3.145 1901 2.779 1902 2.363 1903 2.69 1904 2.645 1905 2.947 1906 2.553 1907 2.513 1908 2.799 1909 2.748 1910 2.7 1911 2.655 1912 2.611 1913 2.568 1914 3.643 1915 3.622 1916 3.603 1917 3.862 1918 3.561 1919 3.543 1920 3.792 1921 -3.588 1922 3.305 1923 3.568 1924 3.006 1925 3 1926 2.994 1927 2.987 1928 3.245 1929 3.755 1930 3.988 1931 3.957 1932 3.431 1933 3.416 1934 3.644 1935 3.862 1936 3.836 1937 4.041 1938 4.008 1939 3.976 1940 4.384 1941 5.626 1942 5.93 1943 5.197 1944 4.332 1945 4.288 1946 4.807 1947 6.199 1948 5.171 1949 4.916 1950 5.509 1951 7.925 1952 3.306 1953 2.817 1954 1.847 1955 13.87 1956 21.31 1957 9.406 1958 8.494 1959 5.446 1960 11.49 1961 3.749 1962 3.514 1963 4.107 1964 2.188 1965 4.602 1966 4.451 1967 3.021 1968 6.74 1969 4.454 1970 5.806 1971 1.374 1972 5.148 1973 1.357 1974 5.002 1975 1.62 1976 9.158 1977 5.819 1978 11.41 1979 4.452 1980 7.985 1981 5.142 1982 -5.36 1983 -7.532 1984 6.166 1985 -4.106 1986 -3.427 1987 -4.766 1988 -3.886 1989 -0.4203 1990 2.392 1991 4.755 1992 0.4012 1993 0.3753 1994 5.776 1995 5.448 1996 5.304 1997 4.601 1998 5.919 1999 7.819 2000 5.899 2001 5.391 2002 4.36 2003 14.09 2004 7.65 2005 10.22 2006 13.34 2007 4.748 2008 3.381 2009 -4.121 2010 0.01401 2011 -2.645 2012 1.263 2013 1.443