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 0.8876 1822 0.8877 1823 0.8876 1824 0.8876 1825 0.8877 1826 0.8878 1827 0.8876 1828 0.8876 1829 0.8879 1830 0.8874 1831 0.8877 1832 0.8877 1833 0.8877 1834 0.8877 1835 0.8875 1836 0.8877 1837 0.8877 1838 0.8877 1839 0.8876 1840 0.8876 1841 0.8878 1842 0.8875 1843 0.8877 1844 0.8879 1845 0.8875 1846 0.8877 1847 0.8876 1848 0.8877 1849 0.8876 1850 0.8878 1851 0.8876 1852 0.8875 1853 0.8879 1854 0.8875 1855 0.8878 1856 0.8877 1857 0.8877 1858 0.8876 1859 0.8876 1860 0.8877 1861 0.8877 1862 0.8877 1863 0.8875 1864 0.8878 1865 0.8876 1866 0.8878 1867 0.8876 1868 0.8878 1869 0.8875 1870 0.8877 1871 0.8877 1872 0.8877 1873 0.8876 1874 0.8876 1875 0.8877 1876 0.8876 1877 0.8878 1878 0.8877 1879 0.8876 1880 0.8877 1881 0.8876 1882 0.8877 1883 0.8876 1884 0.8877 1885 0.8878 1886 0.8876 1887 0.8877 1888 0.8877 1889 0.8876 1890 0.8878 1891 0.8876 1892 0.8877 1893 0.8877 1894 0.8877 1895 0.8877 1896 0.8877 1897 0.8876 1898 0.8876 1899 0.8878 1900 0.8876 1901 0.8877 1902 0.8876 1903 0.8878 1904 0.8875 1905 0.8878 1906 0.8876 1907 0.8877 1908 0.8877 1909 0.8876 1910 0.8877 1911 0.8876 1912 0.8877 1913 0.8877 1914 0.9471 1915 0.9471 1916 0.9472 1917 0.9472 1918 0.9472 1919 0.9472 1920 0.9472 1921 0.9472 1922 0.9472 1923 0.9472 1924 0.9472 1925 0.9471 1926 0.9472 1927 0.9472 1928 0.9471 1929 0.9472 1930 0.9472 1931 0.9471 1932 0.9472 1933 0.9473 1934 0.9472 1935 0.9472 1936 0.9471 1937 0.9472 1938 0.9472 1939 0.9472 1940 0.9472 1941 0.9473 1942 0.9471 1943 0.9473 1944 0.9471 1945 0.9472 1946 0.9472 1947 0.9472 1948 0.9472 1949 0.9471 1950 0.9472 1951 5.22 1952 5.264 1953 5.28 1954 5.363 1955 5.415 1956 5.442 1957 5.366 1958 5.281 1959 5.374 1960 9.622 1961 18.86 1962 -0.6767 1963 -4.719 1964 31.75 1965 15.51 1966 1.936 1967 4.859 1968 10.28 1969 -0.2866 1970 11.79 1971 2.242 1972 2.557 1973 -5.063 1974 11.59 1975 -5.308 1976 9.193 1977 -0.2396 1978 0.5374 1979 5.501 1980 4.741 1981 4.456 1982 -1.518 1983 5.341 1984 -6.94 1985 3.049 1986 5.703 1987 3.07 1988 3.632 1989 3.639 1990 -1.2 1991 2.487 1992 0.6789 1993 4.252 1994 4.068 1995 4.718 1996 6.385 1997 3.728 1998 3.716 1999 3.981 2000 4.967 2001 4.345 2002 4.067 2003 5.553 2004 5.113 2005 5.033 2006 11.48 2007 1.013 2008 3.503 2009 -1.209 2010 5.057 2011 3.842 2012 6.865 2013 6.499