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 2.282 1822 2.282 1823 2.282 1824 2.282 1825 2.282 1826 2.282 1827 2.282 1828 2.282 1829 2.282 1830 2.283 1831 2.282 1832 2.282 1833 2.282 1834 2.282 1835 2.282 1836 2.282 1837 2.282 1838 2.282 1839 2.282 1840 2.282 1841 2.282 1842 2.282 1843 2.282 1844 2.282 1845 2.282 1846 2.282 1847 2.282 1848 2.282 1849 2.282 1850 2.282 1851 1.72 1852 1.72 1853 1.72 1854 1.72 1855 1.72 1856 1.72 1857 1.72 1858 1.72 1859 1.72 1860 1.72 1861 1.72 1862 1.72 1863 1.72 1864 1.72 1865 1.72 1866 1.72 1867 1.72 1868 1.72 1869 1.72 1870 1.72 1871 1.717 1872 1.717 1873 1.717 1874 1.717 1875 1.717 1876 1.717 1877 1.717 1878 1.717 1879 1.717 1880 1.717 1881 1.717 1882 1.717 1883 1.717 1884 1.717 1885 1.717 1886 1.717 1887 1.717 1888 1.717 1889 1.717 1890 1.717 1891 1.717 1892 1.717 1893 1.717 1894 1.717 1895 1.717 1896 1.717 1897 1.717 1898 1.717 1899 1.717 1900 1.717 1901 2.063 1902 2.114 1903 2.092 1904 2.071 1905 2.119 1906 2.097 1907 2.076 1908 2.055 1909 2.099 1910 2.078 1911 2.12 1912 2.098 1913 2.076 1914 1.46 1915 1.453 1916 1.446 1917 1.498 1918 1.433 1919 1.426 1920 1.534 1921 1.469 1922 1.462 1923 1.455 1924 1.449 1925 1.442 1926 1.489 1927 1.428 1928 1.475 1929 1.468 1930 1.461 1931 3.266 1932 3.4 1933 2.835 1934 2.787 1935 3.259 1936 3.055 1937 2.818 1938 3.122 1939 3.062 1940 6.599 1941 0.5084 1942 4.195 1943 12.68 1944 1.318 1945 0.4002 1946 11.91 1947 11.11 1948 13.66 1949 1.816 1950 9.252 1951 1.069 1952 12.35 1953 2.115 1954 8.081 1955 2.615 1956 3.687 1957 4.518 1958 2.939 1959 5.377 1960 6.498 1961 2.514 1962 5.323 1963 2.556 1964 7.052 1965 9.645 1966 2.627 1967 5.294 1968 5.532 1969 5.467 1970 7.006 1971 5.753 1972 6.146 1973 12.45 1974 5.841 1975 5.251 1976 9.678 1977 6.333 1978 6.953 1979 5.416 1980 4.579 1981 4.076 1982 1.095 1983 -2.11 1984 4.044 1985 4.184 1986 2.87 1987 -6.371 1988 10.52 1989 -0.03423 1990 2.567 1991 5.26 1992 3.099 1993 2.175 1994 4.329 1995 2.834 1996 1.69 1997 2.997 1998 0.06613 1999 -7.422 2000 -14.44 2001 5.223 2002 1.029 2003 4.159 2004 8.583 2005 5.222 2006 4.514 2007 2.238 2008 6.36 2009 0.997 2010 3.194 2011 7.868 2012 4.814 2013 3.918