Year Total 1801 0.06096 1802 0.06111 1803 0.06108 1804 0.06104 1805 0.061 1806 0.06115 1807 0.06111 1808 0.06108 1809 0.06104 1810 0.061 1811 0.06097 1812 0.06112 1813 0.06108 1814 0.06104 1815 0.061 1816 0.06115 1817 0.06112 1818 0.06108 1819 0.06104 1820 0.061 1821 1.507 1822 1.507 1823 1.508 1824 1.507 1825 1.507 1826 1.507 1827 1.507 1828 1.507 1829 1.507 1830 1.507 1831 1.507 1832 1.508 1833 1.507 1834 1.507 1835 1.507 1836 1.507 1837 1.507 1838 1.508 1839 1.507 1840 1.507 1841 1.507 1842 1.507 1843 1.507 1844 1.508 1845 1.507 1846 1.507 1847 1.507 1848 1.508 1849 1.507 1850 1.508 1851 1.507 1852 1.508 1853 1.507 1854 1.507 1855 1.507 1856 1.507 1857 1.507 1858 1.507 1859 1.507 1860 1.507 1861 1.507 1862 1.507 1863 1.507 1864 1.508 1865 1.507 1866 1.507 1867 1.507 1868 1.508 1869 1.507 1870 1.508 1871 1.507 1872 1.507 1873 1.507 1874 1.507 1875 1.507 1876 1.507 1877 1.507 1878 1.507 1879 1.507 1880 1.507 1881 1.508 1882 1.507 1883 1.507 1884 1.507 1885 1.507 1886 1.507 1887 1.507 1888 1.508 1889 1.507 1890 1.507 1891 1.507 1892 1.507 1893 1.507 1894 1.508 1895 1.507 1896 1.507 1897 1.507 1898 1.508 1899 1.507 1900 1.507 1901 1.507 1902 1.507 1903 1.507 1904 1.507 1905 1.507 1906 1.507 1907 1.507 1908 1.507 1909 1.508 1910 1.507 1911 1.507 1912 1.507 1913 1.507 1914 1.507 1915 1.507 1916 1.507 1917 1.507 1918 1.507 1919 1.507 1920 1.507 1921 1.507 1922 1.507 1923 1.507 1924 1.507 1925 1.507 1926 1.507 1927 1.507 1928 1.507 1929 1.507 1930 1.508 1931 1.507 1932 1.507 1933 1.507 1934 1.507 1935 1.507 1936 1.507 1937 1.507 1938 1.507 1939 1.507 1940 1.507 1941 1.507 1942 1.507 1943 1.507 1944 1.507 1945 1.507 1946 1.507 1947 1.507 1948 1.507 1949 1.507 1950 1.507 1951 9.586 1952 6.48 1953 1.349 1954 -0.218 1955 26.57 1956 22.98 1957 5.534 1958 11.53 1959 9.344 1960 30.44 1961 10.84 1962 33.76 1963 36 1964 42.42 1965 29.27 1966 19.31 1967 12.73 1968 35 1969 13.41 1970 6.147 1971 -4.648 1972 -10.9 1973 0.6131 1974 -14.95 1975 8.05 1976 24.91 1977 11.8 1978 6.035 1979 14.2 1980 1.669 1981 -17.63 1982 -1.639 1983 0.6053 1984 -6.626 1985 -5.754 1986 -5.529 1987 -2.353 1988 0.8803 1989 0.8028 1990 -1.606 1991 -5.732 1992 -3.877 1993 -4.212 1994 -0.8442 1995 1.04 1996 5.491 1997 6.497 1998 -3.227 1999 1.494 2000 3.849 2001 6.377 2002 1.876 2003 6.45 2004 5.612 2005 7.011 2006 6.5 2007 6.354 2008 2.666 2009 -0.7901 2010 4.65 2011 -61.17 2012 102.9 2013 -10.21