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 1.17
1822 1.17
1823 1.17
1824 1.17
1825 1.17
1826 1.17
1827 1.17
1828 1.17
1829 1.17
1830 1.17
1831 1.17
1832 1.17
1833 1.17
1834 1.17
1835 1.17
1836 1.17
1837 1.17
1838 1.17
1839 1.17
1840 1.17
1841 1.17
1842 1.17
1843 1.17
1844 1.17
1845 1.17
1846 1.17
1847 1.17
1848 1.17
1849 1.17
1850 1.17
1851 0.7457
1852 0.7457
1853 0.7457
1854 0.7457
1855 0.7457
1856 0.7457
1857 0.7457
1858 0.7457
1859 0.7457
1860 0.7457
1861 0.7458
1862 0.7457
1863 0.7457
1864 0.7457
1865 0.7457
1866 0.7458
1867 0.7457
1868 0.7457
1869 0.7457
1870 0.7457
1871 1.663
1872 1.663
1873 1.663
1874 1.663
1875 1.663
1876 1.663
1877 1.663
1878 1.663
1879 1.663
1880 1.663
1881 1.663
1882 1.663
1883 1.663
1884 1.663
1885 1.663
1886 1.663
1887 1.663
1888 1.663
1889 1.663
1890 1.663
1891 1.767
1892 1.767
1893 1.767
1894 1.767
1895 1.767
1896 1.767
1897 1.767
1898 1.767
1899 1.767
1900 1.767
1901 1.791
1902 1.791
1903 1.791
1904 1.791
1905 1.791
1906 1.791
1907 1.791
1908 1.791
1909 1.791
1910 1.791
1911 2.092
1912 2.092
1913 2.092
1914 -0.7848
1915 -0.7847
1916 -0.7848
1917 -0.7848
1918 -0.7848
1919 -0.7847
1920 -0.7848
1921 8.228
1922 -3.427
1923 7.606
1924 9.8
1925 11.17
1926 -0.814
1927 7.236
1928 8.589
1929 2.563
1930 -3.481
1931 -3.652
1932 -4.244
1933 -4.427
1934 -3.921
1935 -0.9885
1936 8.225
1937 11.29
1938 0.9995
1939 0.9995
1940 0.9995
1941 0.9995
1942 0.9995
1943 0.9995
1944 0.9995
1945 0.9995
1946 0.9995
1947 0.9995
1948 0.9995
1949 5.92
1950 7.793
1951 2.353
1952 3.958
1953 0.3839
1954 5.006
1955 9.443
1956 6.736
1957 6.97
1958 8.525
1959 5.346
1960 8.484
1961 4.492
1962 2.084
1963 -1.354
1964 5.05
1965 3.982
1966 4.641
1967 4.673
1968 5.053
1969 2.826
1970 2.534
1971 3.807
1972 3.897
1973 3.608
1974 3.849
1975 3.172
1976 1.868
1977 4.876
1978 1.608
1979 1.236
1980 3.228
1981 -0.03089
1982 2.465
1983 1.977
1984 2.778
1985 1.185
1986 2.249
1987 0.8325
1988 2.544
1989 1.14
1990 -2.481
1991 -14.55
1992 -6.635
1993 1.848
1994 6.166
1995 5.83
1996 6.954
1997 5.783
1998 3.741
1999 0.3792
2000 0.7714
2001 3.266
2002 4.143
2003 4.19
2004 5.464
2005 6.111
2006 8.281
2007 10.63
2008 5.865
2009 -4.99
2010 4.339
2011 3.146
2012 1.742
2013 0.9744