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 0.6608 1822 0.6608 1823 0.6608 1824 0.6608 1825 0.6608 1826 0.6608 1827 0.6608 1828 0.6608 1829 0.6608 1830 0.6608 1831 0.6608 1832 0.6608 1833 0.6608 1834 0.6608 1835 0.6608 1836 0.6608 1837 0.6608 1838 0.6608 1839 0.6608 1840 0.6608 1841 0.6608 1842 0.6608 1843 0.6608 1844 0.6608 1845 0.6608 1846 0.6608 1847 0.6608 1848 0.6608 1849 0.6608 1850 0.6608 1851 0.6608 1852 0.6608 1853 0.6608 1854 0.6608 1855 0.6608 1856 0.6608 1857 0.6608 1858 0.6608 1859 0.6608 1860 0.6608 1861 0.6608 1862 0.1031 1863 0.1027 1864 0.1023 1865 0.1048 1866 0.1017 1867 0.1041 1868 0.101 1869 0.1036 1870 0.1033 1871 0.1031 1872 0.6608 1873 0.6608 1874 0.6608 1875 0.6608 1876 0.6608 1877 0.6608 1878 0.6608 1879 0.6608 1880 0.6608 1881 0.6608 1882 1.222 1883 1.221 1884 1.221 1885 1.224 1886 1.221 1887 1.223 1888 1.22 1889 1.222 1890 1.222 1891 1.222 1892 0.1031 1893 0.1027 1894 0.1023 1895 0.1048 1896 0.1017 1897 0.1041 1898 0.101 1899 0.1036 1900 0.1033 1901 0.1031 1902 -0.2365 1903 -0.2388 1904 -0.2352 1905 -0.2373 1906 -0.2395 1907 -0.2356 1908 -0.2375 1909 -0.2364 1910 -0.2383 1911 -0.2371 1912 0.01278 1913 0.01491 1914 1.789 1915 1.791 1916 1.794 1917 1.793 1918 1.792 1919 1.791 1920 1.79 1921 1.793 1922 3.837 1923 3.842 1924 3.837 1925 3.838 1926 3.839 1927 3.84 1928 3.84 1929 3.837 1930 3.84 1931 3.84 1932 3.839 1933 3.838 1934 3.84 1935 3.838 1936 3.84 1937 3.841 1938 3.839 1939 3.839 1940 3.839 1941 3.839 1942 3.839 1943 3.838 1944 3.84 1945 3.839 1946 3.838 1947 4.978 1948 4.979 1949 4.979 1950 4.979 1951 6.909 1952 5.822 1953 4.937 1954 4.225 1955 3.678 1956 3.3 1957 3.092 1958 3.061 1959 3.206 1960 3.492 1961 3.859 1962 4.215 1963 4.469 1964 4.556 1965 4.531 1966 4.485 1967 4.455 1968 4.385 1969 4.272 1970 4.132 1971 6.345 1972 6.08 1973 7.294 1974 2.696 1975 -5.51 1976 -8.263 1977 8.817 1978 5.334 1979 12.57 1980 7.894 1981 5.438 1982 0.3279 1983 6.446 1984 7.097 1985 7.751 1986 8.842 1987 9.506 1988 8.582 1989 6.723 1990 3.247 1991 2.439 1992 1.028 1993 5.4 1994 6.293 1995 -4.191 1996 6.635 1997 5.055 1998 4.453 1999 4.15 2000 1.501 2001 2.199 2002 2.52 2003 5.223 2004 7.205 2005 4.638 2006 12.65 2007 7.008 2008 1.483 2009 -10.71 2010 -7.582 2011 -1.978 2012 3.824 2013 1.46