Year Total 1801 0.2985 1802 0.2985 1803 0.2985 1804 0.2985 1805 0.2985 1806 0.2985 1807 0.2985 1808 0.2985 1809 0.2985 1810 0.2985 1811 0.2985 1812 0.2985 1813 0.2985 1814 0.2985 1815 0.2985 1816 0.2985 1817 0.2985 1818 0.2985 1819 0.2985 1820 0.2985 1821 0.2985 1822 0.2985 1823 0.2985 1824 0.2985 1825 0.2985 1826 0.2985 1827 0.2985 1828 0.2985 1829 0.2985 1830 0.2985 1831 0.2985 1832 0.2985 1833 0.2985 1834 0.2985 1835 0.2985 1836 0.2985 1837 0.2985 1838 0.2985 1839 0.2985 1840 0.2985 1841 0.2985 1842 0.2985 1843 0.2985 1844 0.2985 1845 0.2985 1846 0.2985 1847 0.2985 1848 0.2985 1849 0.2985 1850 0.2985 1851 0.2985 1852 0.2985 1853 0.2985 1854 0.2985 1855 0.2985 1856 0.2985 1857 0.2985 1858 0.2985 1859 0.2985 1860 0.2985 1861 0.2985 1862 0.2985 1863 0.2985 1864 0.2985 1865 0.2985 1866 0.2985 1867 0.2985 1868 0.2985 1869 0.2985 1870 0.2985 1871 0.2985 1872 0.2985 1873 0.2985 1874 0.2985 1875 0.2985 1876 0.2985 1877 0.2985 1878 0.2985 1879 0.2985 1880 0.2985 1881 0.2985 1882 0.2985 1883 0.2985 1884 0.2985 1885 0.2985 1886 0.2985 1887 0.2985 1888 0.2985 1889 0.2985 1890 0.2985 1891 0.2985 1892 0.2985 1893 0.2985 1894 0.2985 1895 0.2985 1896 0.2985 1897 0.2985 1898 0.2985 1899 0.2985 1900 0.2985 1901 0.8378 1902 0.8378 1903 0.8378 1904 0.8378 1905 0.8378 1906 0.8378 1907 0.8378 1908 0.8378 1909 0.8378 1910 0.8378 1911 0.8378 1912 0.8378 1913 0.8378 1914 0.8378 1915 0.8378 1916 0.8378 1917 0.8378 1918 0.8378 1919 0.8378 1920 0.8378 1921 0.8378 1922 2.533 1923 2.533 1924 2.533 1925 2.533 1926 2.533 1927 2.533 1928 2.533 1929 2.533 1930 2.533 1931 2.533 1932 4.113 1933 4.113 1934 4.113 1935 4.113 1936 4.113 1937 4.113 1938 4.113 1939 4.113 1940 4.113 1941 4.113 1942 4.113 1943 4.113 1944 4.113 1945 4.113 1946 4.113 1947 4.113 1948 4.113 1949 4.113 1950 13.35 1951 17.37 1952 -5.76 1953 -4.402 1954 8.324 1955 5.932 1956 5.19 1957 4.551 1958 0.3522 1959 -3.194 1960 8.3 1961 -3.545 1962 8.284 1963 4.352 1964 5.994 1965 4.906 1966 11.95 1967 4.294 1968 0.05322 1969 6.48 1970 -5.072 1971 6.501 1972 5.027 1973 5.203 1974 4.902 1975 -0.3722 1976 4.027 1977 9.178 1978 8.991 1979 3.756 1980 5.591 1981 3.765 1982 3.687 1983 1.366 1984 1.768 1985 4.275 1986 7.167 1987 5.923 1988 6.198 1989 4.695 1990 4.212 1991 1.408 1992 -0.7932 1993 0.3598 1994 2.629 1995 4.405 1996 4.145 1997 0.2703 1998 3.356 1999 2.105 2000 0.4976 2001 4.467 2002 0.5718 2003 2.905 2004 5.104 2005 5.912 2006 6.326 2007 6.993 2008 1.527 2009 2.735 2010 5.764 2011 4.377 2012 4.559 2013 5.591