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 1.44
1822 1.44
1823 1.44
1824 1.44
1825 1.44
1826 1.44
1827 1.44
1828 1.44
1829 1.44
1830 1.44
1831 1.44
1832 1.44
1833 1.44
1834 1.44
1835 1.44
1836 1.44
1837 1.44
1838 1.44
1839 1.44
1840 1.44
1841 1.44
1842 1.44
1843 1.44
1844 1.44
1845 1.44
1846 1.44
1847 1.44
1848 1.44
1849 1.44
1850 1.44
1851 1.44
1852 1.44
1853 1.44
1854 1.44
1855 1.44
1856 1.44
1857 1.44
1858 1.44
1859 1.44
1860 1.44
1861 1.44
1862 1.44
1863 1.44
1864 1.44
1865 1.44
1866 1.44
1867 1.44
1868 1.44
1869 1.44
1870 1.44
1871 1.44
1872 1.44
1873 1.44
1874 1.44
1875 1.44
1876 1.44
1877 1.44
1878 1.44
1879 1.44
1880 1.44
1881 1.44
1882 1.44
1883 1.44
1884 1.44
1885 1.44
1886 1.44
1887 1.44
1888 1.44
1889 1.44
1890 1.44
1891 1.44
1892 1.44
1893 1.44
1894 1.44
1895 1.44
1896 1.44
1897 1.44
1898 1.44
1899 1.44
1900 1.44
1901 1.44
1902 1.44
1903 1.44
1904 1.44
1905 1.44
1906 1.44
1907 1.44
1908 1.44
1909 1.44
1910 1.44
1911 1.44
1912 1.44
1913 1.44
1914 1.558
1915 1.558
1916 1.558
1917 1.558
1918 1.558
1919 1.558
1920 1.558
1921 1.558
1922 1.557
1923 1.558
1924 1.558
1925 1.558
1926 1.558
1927 1.557
1928 1.558
1929 1.558
1930 1.558
1931 1.558
1932 1.558
1933 1.558
1934 1.557
1935 1.558
1936 1.558
1937 1.558
1938 1.558
1939 1.558
1940 1.558
1941 1.558
1942 1.558
1943 1.558
1944 1.558
1945 1.558
1946 1.558
1947 1.558
1948 1.558
1949 1.558
1950 1.558
1951 3.083
1952 3.076
1953 6.007
1954 0.2042
1955 5.57
1956 3.51
1957 -0.5372
1958 3.547
1959 3.003
1960 5.488
1961 4.092
1962 3.918
1963 4.24
1964 3.708
1965 6.66
1966 5.22
1967 6.764
1968 5.498
1969 3.839
1970 -1.297
1971 4.585
1972 4.35
1973 2.203
1974 0.01131
1975 -4.687
1976 -0.1699
1977 -0.4608
1978 -6.04
1979 10.39
1980 2.18
1981 2.562
1982 0.9644
1983 7.85
1984 -2.301
1985 -11.41
1986 9.694
1987 13.87
1988 0.5783
1989 -0.4549
1990 2.607
1991 -7.222
1992 -8.778
1993 13
1994 3.063
1995 6.007
1996 12.31
1997 3.031
1998 -3.573
1999 4.99
2000 5.834
2001 7.991
2002 1.17
2003 -2.535
2004 13.11
2005 11.34
2006 10.34
2007 10.94
2008 10.26
2009 8.282
2010 12.01
2011 10.75
2012 8.26
2013 9.413