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 0.8393 1822 0.8392 1823 0.8397 1824 0.8389 1825 0.8398 1826 0.8389 1827 0.8397 1828 0.8393 1829 0.8394 1830 0.8389 1831 0.8394 1832 0.8394 1833 0.8392 1834 0.8396 1835 0.8394 1836 0.8391 1837 0.8393 1838 0.8394 1839 0.8395 1840 0.839 1841 0.8395 1842 0.8394 1843 0.8393 1844 0.839 1845 0.8398 1846 0.839 1847 0.8396 1848 0.8392 1849 0.8392 1850 0.8392 1851 0.8396 1852 0.8394 1853 0.8392 1854 0.8394 1855 0.8391 1856 0.8396 1857 0.8392 1858 0.8392 1859 0.8395 1860 0.8394 1861 0.8392 1862 0.8394 1863 0.8391 1864 0.8396 1865 0.8392 1866 0.8396 1867 0.839 1868 0.8393 1869 0.8395 1870 0.8392 1871 0.8393 1872 0.8394 1873 0.8393 1874 0.8392 1875 0.8395 1876 0.8393 1877 0.8394 1878 0.8391 1879 0.8395 1880 0.8391 1881 0.8394 1882 0.8396 1883 0.839 1884 0.8395 1885 0.8392 1886 0.8395 1887 0.8391 1888 0.8393 1889 0.8395 1890 0.8393 1891 0.8393 1892 0.8393 1893 0.8393 1894 0.8395 1895 0.8393 1896 0.8394 1897 0.8391 1898 0.8394 1899 0.8394 1900 0.8392 1901 1.24 1902 1.24 1903 1.241 1904 1.24 1905 1.24 1906 1.24 1907 1.24 1908 1.24 1909 1.24 1910 1.24 1911 1.24 1912 1.241 1913 1.24 1914 1.24 1915 1.24 1916 1.24 1917 1.24 1918 1.24 1919 1.24 1920 1.24 1921 1.24 1922 1.24 1923 1.24 1924 1.24 1925 1.24 1926 1.24 1927 1.24 1928 1.24 1929 1.24 1930 1.24 1931 1.24 1932 1.24 1933 1.24 1934 1.24 1935 1.24 1936 1.24 1937 1.24 1938 1.24 1939 1.24 1940 1.24 1941 1.24 1942 1.24 1943 1.24 1944 1.24 1945 1.24 1946 1.24 1947 1.24 1948 1.24 1949 1.24 1950 1.24 1951 7.304 1952 7.434 1953 7.515 1954 7.56 1955 7.581 1956 7.589 1957 7.596 1958 7.613 1959 7.647 1960 7.699 1961 14.15 1962 14.23 1963 14.29 1964 14.33 1965 14.38 1966 -4.565 1967 20.26 1968 6.558 1969 12.61 1970 22.36 1971 25.89 1972 8.275 1973 37.43 1974 123.1 1975 1.253 1976 22.17 1977 -3.048 1978 11.65 1979 10.47 1980 15.69 1981 1.881 1982 -8.157 1983 10.39 1984 -1.538 1985 -7.762 1986 -19.4 1987 -7.756 1988 -5.663 1989 35.17 1990 -0.04925 1991 7.79 1992 -4.552 1993 -0.6185 1994 7.731 1995 2.824 1996 11.39 1997 -16.23 1998 -13.26 1999 11 2000 23.87 2001 -5.5 2002 -1.156 2003 9.629 2004 13.84 2005 36.66 2006 1.13 2007 1.565 2008 20.12 2009 -8.051 2010 25.1 2011 -7.357 2012 6.027 2013 6.389