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 0.8258 1822 0.8258 1823 0.8257 1824 0.8258 1825 0.8258 1826 0.8257 1827 0.8258 1828 0.8257 1829 0.8258 1830 0.8258 1831 0.8258 1832 0.8258 1833 0.8257 1834 0.8258 1835 0.8257 1836 0.8258 1837 0.8258 1838 0.8258 1839 0.8257 1840 0.8258 1841 0.8258 1842 0.8258 1843 0.8257 1844 0.8258 1845 0.8258 1846 0.8258 1847 0.8258 1848 0.8258 1849 0.8258 1850 0.8258 1851 0.8257 1852 0.8258 1853 0.8257 1854 0.8258 1855 0.8258 1856 0.8257 1857 0.8258 1858 0.8257 1859 0.8258 1860 0.8258 1861 0.8257 1862 0.8258 1863 0.8258 1864 0.8258 1865 0.8258 1866 0.8258 1867 0.8258 1868 0.8258 1869 0.8258 1870 0.8258 1871 1.049 1872 1.049 1873 1.049 1874 1.049 1875 1.049 1876 1.049 1877 1.049 1878 1.049 1879 1.049 1880 1.049 1881 1.049 1882 1.049 1883 1.049 1884 1.049 1885 1.049 1886 1.049 1887 1.049 1888 1.049 1889 1.049 1890 1.049 1891 1.049 1892 1.049 1893 1.049 1894 1.049 1895 1.049 1896 1.049 1897 1.049 1898 1.049 1899 1.049 1900 1.049 1901 1.049 1902 1.049 1903 1.049 1904 1.049 1905 1.049 1906 1.049 1907 1.049 1908 1.049 1909 1.049 1910 1.049 1911 1.049 1912 1.049 1913 1.049 1914 1.424 1915 1.424 1916 1.424 1917 1.424 1918 1.424 1919 1.424 1920 1.424 1921 1.424 1922 1.424 1923 1.424 1924 1.424 1925 1.424 1926 1.424 1927 1.424 1928 1.424 1929 1.424 1930 1.424 1931 1.424 1932 1.424 1933 1.424 1934 1.424 1935 1.424 1936 1.424 1937 1.424 1938 1.424 1939 1.424 1940 1.424 1941 1.424 1942 1.424 1943 1.424 1944 1.424 1945 1.424 1946 1.424 1947 1.424 1948 1.424 1949 1.424 1950 1.424 1951 2.803 1952 3.256 1953 5.971 1954 1.97 1955 1.833 1956 4.32 1957 -0.1819 1958 5.416 1959 2.652 1960 3.374 1961 0.6454 1962 1.487 1963 1.599 1964 1.7 1965 2.003 1966 0.7448 1967 2.476 1968 3.302 1969 1.428 1970 1.939 1971 -4.763 1972 -1.859 1973 11.36 1974 5.203 1975 4.71 1976 4.313 1977 -7.685 1978 6.537 1979 -1.697 1980 -0.2804 1981 9.092 1982 6.621 1983 0.7665 1984 -4.55 1985 -5.575 1986 5.02 1987 -18.58 1988 -9.863 1989 -0.3405 1990 -0.8846 1991 7.345 1992 1.22 1993 -5.14 1994 -2.571 1995 28.28 1996 7.308 1997 5.875 1998 5.013 1999 4.952 2000 1.744 2001 -7.154 2002 27.1 2003 12.59 2004 6.546 2005 12.36 2006 4.558 2007 13.61 2008 2.502 2009 20.17 2010 8.043 2011 6.977 2012 14.79 2013 4.469