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 1.838
1822 1.838
1823 1.838
1824 1.838
1825 1.838
1826 1.838
1827 1.838
1828 1.838
1829 1.838
1830 1.838
1831 1.838
1832 1.838
1833 1.838
1834 1.838
1835 1.838
1836 1.838
1837 1.838
1838 1.838
1839 1.838
1840 1.838
1841 1.838
1842 1.838
1843 1.838
1844 1.838
1845 1.838
1846 1.838
1847 1.838
1848 1.838
1849 1.838
1850 1.838
1851 1.837
1852 1.837
1853 1.837
1854 1.837
1855 1.837
1856 1.837
1857 1.837
1858 1.837
1859 1.837
1860 1.837
1861 1.837
1862 1.837
1863 1.837
1864 1.837
1865 1.837
1866 1.837
1867 1.837
1868 1.837
1869 1.837
1870 1.837
1871 1.477
1872 1.477
1873 1.477
1874 1.477
1875 1.477
1876 1.477
1877 1.477
1878 1.477
1879 1.477
1880 1.477
1881 1.477
1882 1.477
1883 1.477
1884 1.477
1885 1.477
1886 1.477
1887 1.477
1888 1.477
1889 1.477
1890 1.477
1891 1.477
1892 1.477
1893 1.477
1894 1.477
1895 1.477
1896 1.477
1897 1.477
1898 1.477
1899 1.477
1900 1.477
1901 2.165
1902 2.169
1903 21.74
1904 -13.88
1905 6.41
1906 3.87
1907 5.394
1908 5.726
1909 1.876
1910 15.04
1911 6.402
1912 1.783
1913 10.51
1914 -1.823
1915 -6.273
1916 16.81
1917 16.64
1918 14.18
1919 -3.88
1920 8.38
1921 -2.322
1922 11.99
1923 -6.136
1924 9.15
1925 0.7874
1926 5.007
1927 2.494
1928 3.867
1929 4.296
1930 0.1208
1931 0.7789
1932 4.447
1933 0.9433
1934 0.9035
1935 -6.789
1936 13.77
1937 7.204
1938 3.281
1939 6.972
1940 1.813
1941 -11.5
1942 -11.79
1943 -11.23
1944 -11.51
1945 -11.51
1946 -10.56
1947 39.49
1948 16.84
1949 6.322
1950 7.583
1951 11.36
1952 6.809
1953 9.56
1954 8.103
1955 7.473
1956 7.5
1957 5.837
1958 3.847
1959 7.185
1960 1.711
1961 5.929
1962 5.042
1963 7.274
1964 3.572
1965 5.301
1966 4.397
1967 5.267
1968 4.885
1969 4.616
1970 3.76
1971 5.458
1972 5.505
1973 9.014
1974 3.675
1975 5.724
1976 8.886
1977 5.657
1978 5.201
1979 5.65
1980 5.16
1981 3.799
1982 4.005
1983 2.392
1984 -6.89
1985 -6.942
1986 3.791
1987 4.703
1988 7.166
1989 6.499
1990 3.184
1991 -0.4112
1992 0.6023
1993 2.349
1994 4.526
1995 4.703
1996 5.751
1997 5.234
1998 -0.4599
1999 3.568
2000 6.085
2001 1.843
2002 4.458
2003 5.009
2004 6.483
2005 4.946
2006 5.067
2007 6.369
2008 3.844
2009 2.299
2010 7.569
2011 3.887
2012 6.824
2013 7.103