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 0.3141 1822 0.3141 1823 0.3141 1824 0.3141 1825 0.3141 1826 0.3141 1827 0.3141 1828 0.3141 1829 0.3141 1830 0.3141 1831 0.3141 1832 0.3141 1833 0.3141 1834 0.3141 1835 0.3141 1836 0.3141 1837 0.3141 1838 0.3141 1839 0.3141 1840 0.3141 1841 0.3141 1842 0.3141 1843 0.3141 1844 0.3141 1845 0.3141 1846 0.3141 1847 0.3141 1848 0.3141 1849 0.3141 1850 0.3141 1851 0.3141 1852 1.501 1853 1.504 1854 1.502 1855 1.504 1856 1.502 1857 1.5 1858 1.506 1859 1.5 1860 1.505 1861 1.502 1862 2.034 1863 2.031 1864 2.034 1865 2.034 1866 2.032 1867 2.034 1868 2.032 1869 2.033 1870 2.033 1871 2.033 1872 2.317 1873 2.318 1874 2.321 1875 2.317 1876 2.318 1877 2.319 1878 2.319 1879 2.317 1880 2.318 1881 2.318 1882 1.06 1883 1.06 1884 1.062 1885 1.059 1886 1.061 1887 1.06 1888 1.062 1889 1.059 1890 1.061 1891 1.06 1892 2.079 1893 2.077 1894 2.079 1895 2.08 1896 2.078 1897 2.078 1898 2.078 1899 2.079 1900 2.078 1901 2.078 1902 0.1115 1903 0.1111 1904 0.1127 1905 0.1123 1906 0.1098 1907 0.1135 1908 0.111 1909 0.1106 1910 0.1122 1911 0.1118 1912 0.9119 1913 0.9124 1914 0.9109 1915 0.9134 1916 0.9118 1917 0.9123 1918 0.9107 1919 0.9131 1920 0.9115 1921 0.9118 1922 1.514 1923 1.513 1924 1.514 1925 1.515 1926 1.513 1927 1.514 1928 1.514 1929 1.514 1930 1.514 1931 1.514 1932 1.515 1933 1.514 1934 1.513 1935 1.514 1936 1.515 1937 1.513 1938 1.513 1939 1.515 1940 1.513 1941 1.515 1942 1.514 1943 1.513 1944 1.514 1945 1.515 1946 1.513 1947 4.61 1948 4.61 1949 4.61 1950 4.609 1951 5.494 1952 5.246 1953 5.045 1954 4.895 1955 4.798 1956 4.753 1957 4.765 1958 4.832 1959 4.956 1960 5.121 1961 5.304 1962 5.479 1963 5.611 1964 5.683 1965 5.702 1966 5.733 1967 5.756 1968 5.709 1969 5.57 1970 5.383 1971 4.909 1972 2.431 1973 1.321 1974 5.58 1975 4.325 1976 18.72 1977 9.344 1978 7.657 1979 2.828 1980 -5.578 1981 2.561 1982 2.941 1983 5.536 1984 6.862 1985 7.546 1986 16.91 1987 2.855 1988 14.43 1989 7.516 1990 3.055 1991 0.6266 1992 7.303 1993 0.2841 1994 1.927 1995 1.374 1996 7.345 1997 0.192 1998 6.93 1999 2.764 2000 -0.1181 2001 -5.325 2002 2.835 2003 4.162 2004 5.088 2005 5.57 2006 9.5 2007 2.163 2008 5.682 2009 0.8939 2010 0.7197 2011 1.794 2012 -0.9317 2013 -1.205