Year Total 1801 0.382 1802 0.382 1803 0.382 1804 0.382 1805 0.382 1806 0.382 1807 0.382 1808 0.382 1809 0.382 1810 0.382 1811 0.382 1812 0.382 1813 0.382 1814 0.382 1815 0.382 1816 0.382 1817 0.382 1818 0.382 1819 0.382 1820 0.382 1821 0.7267 1822 0.7335 1823 0.7243 1824 0.7311 1825 0.7298 1826 0.7286 1827 0.7274 1828 0.7341 1829 0.7251 1830 0.7317 1831 0.7304 1832 0.7292 1833 0.728 1834 0.7269 1835 0.7257 1836 0.7321 1837 0.7309 1838 0.7297 1839 0.7285 1840 0.7273 1841 0.7261 1842 0.7324 1843 0.7312 1844 0.73 1845 0.7288 1846 0.7276 1847 0.7264 1848 0.7325 1849 0.724 1850 0.7301 1851 0.7289 1852 0.7349 1853 0.7265 1854 0.7253 1855 0.7313 1856 0.7301 1857 0.7289 1858 0.7277 1859 0.7335 1860 0.7253 1861 0.7311 1862 0.7299 1863 0.7287 1864 0.7275 1865 0.7263 1866 0.732 1867 0.7308 1868 0.7296 1869 0.7284 1870 0.7272 1871 0.7327 1872 0.7248 1873 0.7303 1874 0.7291 1875 0.7279 1876 0.7334 1877 0.7255 1878 0.7309 1879 0.7297 1880 0.7285 1881 0.7273 1882 0.7326 1883 0.7249 1884 0.7302 1885 0.729 1886 0.7278 1887 0.733 1888 0.7254 1889 0.7306 1890 0.7294 1891 0.7282 1892 2.12 1893 2.121 1894 2.128 1895 2.122 1896 2.121 1897 2.121 1898 2.119 1899 2.123 1900 2.121 1901 2.123 1902 2.316 1903 2.321 1904 2.319 1905 2.318 1906 2.32 1907 2.317 1908 2.318 1909 2.319 1910 2.318 1911 2.317 1912 1.224 1913 1.222 1914 4.584 1915 4.581 1916 4.582 1917 4.584 1918 4.581 1919 4.586 1920 4.579 1921 4.585 1922 4.515 1923 4.517 1924 4.515 1925 4.517 1926 4.515 1927 4.513 1928 4.519 1929 4.516 1930 4.514 1931 4.516 1932 5.347 1933 5.344 1934 5.345 1935 5.349 1936 5.346 1937 5.345 1938 5.344 1939 5.347 1940 5.349 1941 5.343 1942 5.348 1943 5.345 1944 5.348 1945 5.345 1946 5.345 1947 5.347 1948 5.348 1949 5.344 1950 5.347 1951 7.219 1952 3.076 1953 3.108 1954 5.62 1955 0.7126 1956 0.04171 1957 3.112 1958 1.802 1959 3.892 1960 6.775 1961 -6.181 1962 8.449 1963 9.282 1964 3.748 1965 0.1578 1966 2.189 1967 -0.1573 1968 8.039 1969 -0.6172 1970 6.947 1971 15.81 1972 5.976 1973 9.52 1974 1.606 1975 3.611 1976 9.953 1977 7.127 1978 7.008 1979 16.59 1980 -2.759 1981 -4.068 1982 -0.7977 1983 0.6241 1984 4.955 1985 10.74 1986 1.367 1987 1.755 1988 6.218 1989 10.93 1990 8.143 1991 2.499 1992 7.795 1993 6.157 1994 -4.055 1995 0.00717 1996 9.467 1997 11.97 1998 1.49 1999 0.9427 2000 4.489 2001 -1.179 2002 0.607 2003 -4.763 2004 -1.331 2005 9.668 2006 8.144 2007 10.75 2008 -3.637 2009 -0.9063 2010 3.553 2011 7.137 2012 1.979 2013 2.674