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 1.172
1822 1.172
1823 1.172
1824 1.172
1825 1.172
1826 1.172
1827 1.172
1828 1.172
1829 1.172
1830 1.172
1831 1.172
1832 1.172
1833 1.172
1834 1.172
1835 1.172
1836 1.172
1837 1.172
1838 1.172
1839 1.172
1840 1.172
1841 1.172
1842 1.172
1843 1.172
1844 1.172
1845 1.172
1846 1.172
1847 1.172
1848 1.172
1849 1.172
1850 1.172
1851 0.7475
1852 0.7475
1853 0.7475
1854 0.7475
1855 0.7475
1856 0.7475
1857 0.7475
1858 0.7475
1859 0.7475
1860 0.7475
1861 0.7475
1862 0.7475
1863 0.7475
1864 0.7475
1865 0.7475
1866 0.7475
1867 0.7475
1868 0.7475
1869 0.7475
1870 0.7475
1871 1.665
1872 1.664
1873 1.664
1874 1.664
1875 1.665
1876 1.664
1877 1.665
1878 1.664
1879 1.665
1880 1.664
1881 1.664
1882 1.665
1883 1.664
1884 1.665
1885 1.664
1886 1.665
1887 1.664
1888 1.665
1889 1.664
1890 1.664
1891 1.769
1892 1.769
1893 1.769
1894 1.769
1895 1.769
1896 1.769
1897 1.769
1898 1.769
1899 1.769
1900 1.769
1901 1.792
1902 1.792
1903 1.792
1904 1.792
1905 1.792
1906 1.792
1907 1.792
1908 1.792
1909 1.792
1910 1.792
1911 2.094
1912 2.094
1913 2.094
1914 -0.783
1915 -0.783
1916 -0.783
1917 -0.783
1918 -0.783
1919 -0.783
1920 -0.783
1921 8.23
1922 -3.425
1923 7.608
1924 9.802
1925 11.17
1926 -0.8123
1927 7.238
1928 8.591
1929 2.565
1930 -3.479
1931 -3.65
1932 -4.243
1933 -4.425
1934 -3.919
1935 -0.9868
1936 8.227
1937 11.29
1938 1.001
1939 1.001
1940 1.001
1941 1.001
1942 1.001
1943 1.001
1944 1.001
1945 1.001
1946 1.001
1947 1.001
1948 1.001
1949 5.922
1950 7.795
1951 1.577
1952 3.001
1953 -0.6511
1954 3.851
1955 8.2
1956 5.515
1957 5.759
1958 7.325
1959 4.22
1960 7.374
1961 3.477
1962 1.152
1963 -2.191
1964 4.234
1965 3.25
1966 3.984
1967 4.089
1968 4.519
1969 2.324
1970 2.035
1971 3.294
1972 3.38
1973 3.092
1974 3.341
1975 2.682
1976 1.403
1977 4.41
1978 1.148
1979 0.7442
1980 2.674
1981 -0.6265
1982 1.805
1983 1.296
1984 2.105
1985 0.5641
1986 1.67
1987 0.3054
1988 2.05
1989 0.6865
1990 -2.89
1991 -11.6
1992 -0.4897
1993 0.08828
1994 2.236
1995 5.963
1996 4.061
1997 -0.685
1998 -0.7207
1999 1.357
2000 3.638
2001 2.4
2002 1.811
2003 3.542
2004 4.539
2005 6.598
2006 7.1
2007 5.926
2008 2.798
2009 -4.726
2010 2.63
2011 2.068
2012 -0.9031
2013 -0.747