Year	Total
1800	6.51
1801	6.51
1802	6.51
1803	6.51
1804	6.51
1805	6.51
1806	6.51
1807	6.51
1808	6.51
1809	6.51
1810	6.51
1811	6.51
1812	6.51
1813	6.51
1814	6.51
1815	6.51
1816	6.51
1817	6.51
1818	6.51
1819	6.51
1820	6.51
1821	6.51
1822	6.51
1823	6.51
1824	6.51
1825	6.51
1826	6.51
1827	6.51
1828	6.51
1829	6.51
1830	6.51
1831	6.51
1832	6.51
1833	6.51
1834	6.51
1835	6.51
1836	6.51
1837	6.51
1838	6.51
1839	6.51
1840	6.51
1841	6.51
1842	6.51
1843	6.51
1844	6.51
1845	6.51
1846	6.51
1847	6.51
1848	6.51
1849	6.51
1850	6.51
1851	6.51
1852	6.51
1853	6.51
1854	6.51
1855	6.51
1856	6.51
1857	6.51
1858	6.51
1859	6.51
1860	6.51
1861	6.51
1862	6.51
1863	6.51
1864	6.51
1865	6.51
1866	6.51
1867	6.51
1868	6.51
1869	6.51
1870	6.51
1871	6.51
1872	6.51
1873	6.51
1874	6.51
1875	6.51
1876	6.51
1877	6.51
1878	6.51
1879	6.51
1880	6.51
1881	6.51
1882	6.51
1883	6.51
1884	6.51
1885	6.51
1886	6.51
1887	6.51
1888	6.51
1889	6.51
1890	6.51
1891	6.51
1892	6.51
1893	6.51
1894	6.51
1895	6.51
1896	6.51
1897	6.51
1898	6.51
1899	6.51
1900	6.51
1901	6.51
1902	6.51
1903	6.51
1904	6.51
1905	6.51
1906	6.51
1907	6.51
1908	6.51
1909	6.51
1910	6.51
1911	6.51
1912	6.51
1913	6.51
1914	6.51
1915	6.51
1916	6.51
1917	6.51
1918	6.51
1919	6.51
1920	6.51
1921	6.51
1922	6.51
1923	6.51
1924	6.51
1925	6.51
1926	6.46
1927	6.41
1928	6.36
1929	6.31
1930	6.26
1931	6.2
1932	6.15
1933	6.1
1934	6.05
1935	6
1936	5.95
1937	5.9
1938	5.85
1939	5.79
1940	5.74
1941	5.69
1942	5.64
1943	5.59
1944	5.54
1945	5.49
1946	5.44
1947	5.38
1948	5.33
1949	5.28
1950	5.23
1951	5.24
1952	5.27
1953	5.3
1954	5.33
1955	5.37
1956	5.4
1957	5.44
1958	5.48
1959	5.53
1960	5.57
1961	5.62
1962	5.67
1963	5.72
1964	5.78
1965	5.83
1966	5.88
1967	5.94
1968	5.99
1969	6.04
1970	6.09
1971	6.14
1972	6.19
1973	6.23
1974	6.26
1975	6.29
1976	6.32
1977	6.33
1978	6.34
1979	6.34
1980	6.34
1981	6.32
1982	6.3
1983	6.28
1984	6.25
1985	6.22
1986	6.19
1987	6.16
1988	6.14
1989	6.12
1990	6.11
1991	6.09
1992	6.08
1993	6.07
1994	6.05
1995	6.04
1996	6.02
1997	6
1998	5.98
1999	5.97
2000	5.95
2001	5.93
2002	5.91
2003	5.88
2004	5.86
2005	5.84
2006	5.81
2007	5.79
2008	5.76
2009	5.74
2010	5.71
2011	5.68
2012	5.64
2013	5.6
2014	5.54
2015	5.49
2016	5.43
2017	5.36
2018	5.29