Year	Total
1800	6.37
1801	6.37
1802	6.37
1803	6.37
1804	6.37
1805	6.37
1806	6.37
1807	6.37
1808	6.37
1809	6.37
1810	6.37
1811	6.37
1812	6.37
1813	6.37
1814	6.37
1815	6.37
1816	6.37
1817	6.37
1818	6.37
1819	6.37
1820	6.37
1821	6.37
1822	6.37
1823	6.37
1824	6.37
1825	6.37
1826	6.37
1827	6.37
1828	6.37
1829	6.37
1830	6.37
1831	6.37
1832	6.37
1833	6.37
1834	6.37
1835	6.37
1836	6.37
1837	6.37
1838	6.37
1839	6.37
1840	6.37
1841	6.37
1842	6.37
1843	6.37
1844	6.37
1845	6.37
1846	6.37
1847	6.37
1848	6.37
1849	6.37
1850	6.37
1851	6.37
1852	6.37
1853	6.37
1854	6.37
1855	6.37
1856	6.37
1857	6.37
1858	6.37
1859	6.37
1860	6.37
1861	6.37
1862	6.37
1863	6.37
1864	6.37
1865	6.37
1866	6.37
1867	6.37
1868	6.37
1869	6.37
1870	6.37
1871	6.37
1872	6.37
1873	6.37
1874	6.37
1875	6.37
1876	6.37
1877	6.37
1878	6.37
1879	6.37
1880	6.37
1881	6.37
1882	6.37
1883	6.37
1884	6.37
1885	6.37
1886	6.37
1887	6.37
1888	6.37
1889	6.37
1890	6.37
1891	6.37
1892	6.37
1893	6.37
1894	6.37
1895	6.37
1896	6.37
1897	6.37
1898	6.37
1899	6.37
1900	6.37
1901	6.37
1902	6.37
1903	6.37
1904	6.37
1905	6.37
1906	6.37
1907	6.37
1908	6.37
1909	6.37
1910	6.37
1911	6.37
1912	6.37
1913	6.37
1914	6.37
1915	6.37
1916	6.37
1917	6.37
1918	6.37
1919	6.37
1920	6.37
1921	6.37
1922	6.37
1923	6.37
1924	6.37
1925	6.37
1926	6.33
1927	6.3
1928	6.26
1929	6.22
1930	6.18
1931	6.15
1932	6.11
1933	6.07
1934	6.04
1935	6
1936	5.96
1937	5.93
1938	5.89
1939	5.85
1940	5.81
1941	5.78
1942	5.74
1943	5.7
1944	5.67
1945	5.63
1946	5.59
1947	5.56
1948	5.52
1949	5.48
1950	5.44
1951	5.46
1952	5.49
1953	5.54
1954	5.6
1955	5.68
1956	5.76
1957	5.85
1958	5.94
1959	6.01
1960	6.05
1961	6.05
1962	5.98
1963	5.86
1964	5.67
1965	5.44
1966	5.19
1967	4.94
1968	4.72
1969	4.53
1970	4.37
1971	4.25
1972	4.14
1973	4.03
1974	3.92
1975	3.8
1976	3.68
1977	3.56
1978	3.45
1979	3.34
1980	3.25
1981	3.18
1982	3.13
1983	3.1
1984	3.09
1985	3.1
1986	3.1
1987	3.1
1988	3.08
1989	3.05
1990	3.01
1991	2.97
1992	2.93
1993	2.9
1994	2.88
1995	2.87
1996	2.87
1997	2.87
1998	2.86
1999	2.85
2000	2.82
2001	2.79
2002	2.76
2003	2.72
2004	2.68
2005	2.64
2006	2.6
2007	2.56
2008	2.53
2009	2.5
2010	2.47
2011	2.45
2012	2.43
2013	2.41
2014	2.39
2015	2.37
2016	2.35
2017	2.33
2018	2.31