Year Total 1801 0.1263 1802 0.1246 1803 0.126 1804 0.1259 1805 0.1257 1806 0.1255 1807 0.1254 1808 0.1252 1809 0.1267 1810 0.1249 1811 0.1263 1812 0.1262 1813 0.1244 1814 0.1259 1815 0.1257 1816 0.1256 1817 0.127 1818 0.1252 1819 0.1251 1820 0.1265 1821 0.4499 1822 0.4513 1823 0.4512 1824 0.451 1825 0.4508 1826 0.4507 1827 0.4505 1828 0.4504 1829 0.4518 1830 0.4501 1831 0.4514 1832 0.4497 1833 0.4511 1834 0.451 1835 0.4508 1836 0.4506 1837 0.4505 1838 0.4519 1839 0.4502 1840 0.4515 1841 0.4499 1842 0.4512 1843 0.4511 1844 -0.5675 1845 -0.5663 1846 -0.5681 1847 -0.5668 1848 -0.5685 1849 -0.567 1850 -0.5669 1851 -1.122 1852 -1.12 1853 -1.123 1854 -1.12 1855 -1.121 1856 -1.121 1857 -1.123 1858 -1.121 1859 -1.12 1860 -1.123 1861 -1.122 1862 -1.12 1863 -1.122 1864 -1.121 1865 -1.121 1866 -1.122 1867 -1.12 1868 -1.123 1869 -1.121 1870 -1.121 1871 -1.12 1872 -1.122 1873 -1.123 1874 -1.121 1875 -1.12 1876 -1.122 1877 -1.122 1878 -1.119 1879 -1.123 1880 -1.12 1881 -1.121 1882 -1.122 1883 -1.122 1884 -1.12 1885 -1.123 1886 -1.12 1887 -1.122 1888 -1.121 1889 -1.122 1890 -1.12 1891 -1.121 1892 -1.122 1893 -1.122 1894 -1.119 1895 -1.122 1896 -1.121 1897 -1.12 1898 -1.122 1899 -1.121 1900 -1.122 1901 1.03 1902 1.032 1903 1.03 1904 1.029 1905 1.034 1906 1.029 1907 1.03 1908 1.032 1909 1.03 1910 1.031 1911 1.032 1912 1.031 1913 1.029 1914 5.858 1915 5.856 1916 5.854 1917 5.855 1918 5.856 1919 5.857 1920 5.855 1921 5.856 1922 5.854 1923 5.858 1924 5.856 1925 5.854 1926 5.857 1927 7.356 1928 7.355 1929 7.353 1930 7.356 1931 7.355 1932 7.14 1933 7.138 1934 7.14 1935 7.139 1936 7.14 1937 7.488 1938 7.488 1939 7.488 1940 7.489 1941 7.487 1942 7.49 1943 7.488 1944 7.487 1945 7.488 1946 7.489 1947 7.738 1948 7.738 1949 7.738 1950 7.738 1951 8.384 1952 8.059 1953 7.868 1954 7.777 1955 7.762 1956 7.802 1957 7.874 1958 7.962 1959 8.058 1960 8.149 1961 8.243 1962 8.347 1963 8.463 1964 8.602 1965 8.736 1966 9.577 1967 -4.738 1968 14.93 1969 -2.686 1970 1.626 1971 12.01 1972 -4.687 1973 7.791 1974 17.99 1975 -4.901 1976 8.22 1977 2.077 1978 9.883 1979 3.928 1980 0.4843 1981 8.501 1982 9.969 1983 5.411 1984 5.414 1985 5.403 1986 8.394 1987 7.114 1988 2.4 1989 2.998 1990 2.191 1991 4.872 1992 0.8669 1993 0.07264 1994 0.8201 1995 0.5699 1996 0.4374 1997 2.084 1998 6.393 1999 4.121 2000 4.026 2001 1.257 2002 4.152 2003 2.991 2004 1.414 2005 2.725 2006 1.151 2007 2.126 2008 1.771 2009 1.578 2010 1.577 2011 1.641