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 1.354
1822 1.354
1823 1.354
1824 1.354
1825 1.354
1826 1.354
1827 1.354
1828 1.354
1829 1.354
1830 1.354
1831 1.354
1832 1.354
1833 1.354
1834 1.354
1835 1.354
1836 1.354
1837 1.354
1838 1.354
1839 1.354
1840 1.354
1841 1.354
1842 1.354
1843 1.354
1844 1.354
1845 1.354
1846 1.354
1847 1.354
1848 1.354
1849 1.354
1850 1.354
1851 1.354
1852 1.354
1853 1.354
1854 1.354
1855 1.354
1856 1.354
1857 1.354
1858 1.354
1859 1.354
1860 1.354
1861 1.354
1862 1.354
1863 1.354
1864 1.354
1865 1.354
1866 1.354
1867 1.354
1868 1.354
1869 1.354
1870 1.354
1871 1.354
1872 1.354
1873 1.354
1874 1.354
1875 1.354
1876 1.354
1877 1.354
1878 1.354
1879 1.354
1880 1.354
1881 1.354
1882 1.354
1883 1.354
1884 1.354
1885 1.354
1886 1.354
1887 1.354
1888 1.354
1889 1.354
1890 1.354
1891 1.354
1892 1.354
1893 1.354
1894 1.354
1895 1.354
1896 1.354
1897 1.354
1898 1.354
1899 1.354
1900 1.354
1901 1.354
1902 1.354
1903 1.354
1904 1.354
1905 1.354
1906 1.354
1907 1.354
1908 1.354
1909 1.354
1910 1.354
1911 1.354
1912 1.354
1913 1.354
1914 0.8962
1915 0.8962
1916 0.8962
1917 0.8962
1918 0.8962
1919 0.8962
1920 0.8961
1921 0.8962
1922 0.8962
1923 0.8962
1924 0.8962
1925 0.8962
1926 0.8962
1927 0.8962
1928 0.8962
1929 0.8962
1930 0.8962
1931 0.8962
1932 0.8962
1933 0.8961
1934 0.8962
1935 0.8962
1936 0.8962
1937 0.8961
1938 0.8962
1939 0.8962
1940 0.8962
1941 0.8962
1942 0.8962
1943 0.8962
1944 0.8961
1945 0.8962
1946 0.8962
1947 0.8962
1948 0.8962
1949 0.8962
1950 0.8962
1951 3.933
1952 2.81
1953 2.253
1954 2.18
1955 2.353
1956 2.63
1957 2.802
1958 2.847
1959 2.857
1960 7.749
1961 5.342
1962 2.114
1963 3.462
1964 13.57
1965 13.8
1966 10.42
1967 7.464
1968 7.232
1969 12.8
1970 -0.7469
1971 8.071
1972 3.89
1973 -3.984
1974 4.108
1975 -0.7639
1976 -0.7135
1977 5.162
1978 9.941
1979 6.007
1980 -4.325
1981 -6.11
1982 -3.845
1983 -5.363
1984 3.012
1985 4.574
1986 2.855
1987 1.035
1988 3.913
1989 2.928
1990 -1.938
1991 -1.851
1992 -5.272
1993 -14.27
1994 19.26
1995 3.698
1996 7.806
1997 -5.464
1998 -1.733
1999 3.374
2000 -1.659
2001 0.5979
2002 4.257
2003 4.79
2004 1.844
2005 0.5279
2006 3.772
2007 1.984
2008 2.044
2009 3.51
2010 3.908
2011 4.75
2012 5.342
2013 5.037