Year	Total
1800	6.07
1801	6.07
1802	6.07
1803	6.07
1804	6.07
1805	6.07
1806	6.07
1807	6.07
1808	6.07
1809	6.07
1810	6.07
1811	6.07
1812	6.07
1813	6.07
1814	6.07
1815	6.07
1816	6.07
1817	6.07
1818	6.07
1819	6.07
1820	6.07
1821	6.07
1822	6.07
1823	6.07
1824	6.07
1825	6.07
1826	6.07
1827	6.07
1828	6.07
1829	6.07
1830	6.07
1831	6.07
1832	6.07
1833	6.07
1834	6.07
1835	6.07
1836	6.07
1837	6.07
1838	6.07
1839	6.07
1840	6.07
1841	6.07
1842	6.07
1843	6.07
1844	6.07
1845	6.07
1846	6.07
1847	6.07
1848	6.07
1849	6.07
1850	6.07
1851	6.07
1852	6.07
1853	6.07
1854	6.07
1855	6.07
1856	6.07
1857	6.07
1858	6.07
1859	6.07
1860	6.07
1861	6.07
1862	6.07
1863	6.07
1864	6.07
1865	6.07
1866	6.07
1867	6.07
1868	6.07
1869	6.07
1870	6.07
1871	6.07
1872	6.07
1873	6.07
1874	6.07
1875	6.07
1876	6.07
1877	6.07
1878	6.07
1879	6.07
1880	6.07
1881	6.07
1882	6.07
1883	6.07
1884	6.07
1885	6.07
1886	6.07
1887	6.07
1888	6.07
1889	6.07
1890	6.07
1891	6.07
1892	6.07
1893	6.07
1894	6.07
1895	6.07
1896	6.07
1897	6.06
1898	6.06
1899	6.05
1900	6.05
1901	6.04
1902	6.04
1903	6.03
1904	5.99
1905	5.95
1906	6.06
1907	6.26
1908	6.23
1909	6.2
1910	6.17
1911	6.14
1912	6.11
1913	6.08
1914	5.84
1915	5.72
1916	5.59
1917	5.46
1918	5.34
1919	5.21
1920	5.48
1921	5.48
1922	5.47
1923	5.47
1924	5.46
1925	5.46
1926	5.45
1927	5.45
1928	5.44
1929	5.44
1930	5.44
1931	5.43
1932	5.43
1933	5.42
1934	5.42
1935	5.41
1936	5.41
1937	5.4
1938	5.4
1939	5.4
1940	5.39
1941	5.39
1942	5.38
1943	5.38
1944	5.37
1945	5.37
1946	5.36
1947	5.36
1948	5.35
1949	5.35
1950	5.35
1951	5.39
1952	5.46
1953	5.53
1954	5.58
1955	5.62
1956	5.65
1957	5.67
1958	5.67
1959	5.67
1960	5.67
1961	5.66
1962	5.65
1963	5.63
1964	5.62
1965	5.61
1966	5.6
1967	5.58
1968	5.56
1969	5.52
1970	5.47
1971	5.41
1972	5.34
1973	5.25
1974	5.15
1975	5.04
1976	4.93
1977	4.81
1978	4.68
1979	4.56
1980	4.43
1981	4.3
1982	4.17
1983	4.03
1984	3.89
1985	3.75
1986	3.61
1987	3.47
1988	3.35
1989	3.23
1990	3.12
1991	3.02
1992	2.93
1993	2.84
1994	2.76
1995	2.69
1996	2.63
1997	2.58
1998	2.54
1999	2.52
2000	2.51
2001	2.51
2002	2.51
2003	2.51
2004	2.52
2005	2.51
2006	2.51
2007	2.51
2008	2.5
2009	2.49
2010	2.48
2011	2.47
2012	2.46
2013	2.44
2014	2.41
2015	2.39
2016	2.36
2017	2.34
2018	2.31