Year Total 1801 0.1632 1802 0.1629 1803 0.1626 1804 0.1631 1805 0.1629 1806 0.1634 1807 0.1623 1808 0.1628 1809 0.1633 1810 0.1631 1811 0.1628 1812 0.1633 1813 0.163 1814 0.1628 1815 0.1625 1816 0.163 1817 0.1635 1818 0.1624 1819 0.1629 1820 0.1634 1821 0.4884 1822 0.4881 1823 0.4879 1824 0.4884 1825 0.4881 1826 0.4886 1827 0.4883 1828 0.488 1829 0.4885 1830 0.4882 1831 0.488 1832 0.4884 1833 0.4882 1834 0.4879 1835 0.4884 1836 0.4881 1837 0.4886 1838 0.4883 1839 0.488 1840 0.4885 1841 0.4882 1842 0.4879 1843 0.4884 1844 0.01445 1845 0.01493 1846 0.01469 1847 0.01518 1848 0.01494 1849 0.01471 1850 0.01448 1851 0.07942 1852 0.08029 1853 0.07969 1854 0.07983 1855 0.07923 1856 0.08011 1857 0.07952 1858 0.07966 1859 0.07981 1860 0.07995 1861 0.08011 1862 0.07951 1863 0.07966 1864 0.07982 1865 0.07998 1866 0.07938 1867 0.07954 1868 0.0797 1869 0.07986 1870 0.08003 1871 0.07943 1872 0.08038 1873 0.07978 1874 0.07918 1875 0.08013 1876 0.07953 1877 0.07971 1878 0.07989 1879 0.08008 1880 0.07948 1881 0.07967 1882 -0.1595 1883 -0.1595 1884 -0.1602 1885 -0.1594 1886 -0.1593 1887 -0.16 1888 -0.1591 1889 -0.1598 1890 -0.1597 1891 -0.1596 1892 0.2319 1893 0.2326 1894 0.2325 1895 0.2325 1896 0.2315 1897 0.2323 1898 0.233 1899 0.2321 1900 0.232 1901 0.3247 1902 1.883 1903 1.883 1904 1.884 1905 1.883 1906 1.883 1907 1.883 1908 1.883 1909 1.884 1910 1.883 1911 1.884 1912 1.481 1913 1.481 1914 3.681 1915 3.681 1916 3.681 1917 3.68 1918 3.681 1919 3.68 1920 3.681 1921 3.681 1922 4.097 1923 4.097 1924 4.097 1925 4.097 1926 4.097 1927 4.097 1928 4.097 1929 4.097 1930 4.097 1931 4.097 1932 4.097 1933 4.097 1934 4.097 1935 4.097 1936 4.097 1937 5.33 1938 5.33 1939 5.33 1940 5.33 1941 5.33 1942 5.33 1943 5.33 1944 5.33 1945 5.33 1946 5.33 1947 5.244 1948 5.244 1949 5.245 1950 5.244 1951 5.057 1952 5.477 1953 5.706 1954 5.801 1955 5.814 1956 5.794 1957 5.781 1958 5.803 1959 5.875 1960 5.983 1961 3.554 1962 3.639 1963 6.389 1964 4.903 1965 -2.679 1966 0.01788 1967 13.37 1968 7.929 1969 2.607 1970 12.71 1971 6.899 1972 7.495 1973 11.63 1974 2.616 1975 0.5486 1976 2.76 1977 5.933 1978 1.895 1979 12.26 1980 -1.572 1981 6.363 1982 -5.949 1983 -3.93 1984 8.43 1985 -4.579 1986 7.793 1987 -6.575 1988 1.004 1989 7.497 1990 2.518 1991 2.919 1992 3.224 1993 2.66 1994 5.176 1995 2.591 1996 4.929 1997 -2.056 1998 1.416 1999 8.807 2000 -1.843 2001 1.668 2002 2.719 2003 0.4894 2004 4.874 2005 0.494 2006 1.635 2007 -0.8414 2008 1.215 2009 -1.069 2010 0.3706 2011 2.279 2012 2.053 2013 3.351