Year	Total
1800	6.23
1801	6.23
1802	6.23
1803	6.23
1804	6.23
1805	6.23
1806	6.23
1807	6.23
1808	6.23
1809	6.23
1810	6.23
1811	6.23
1812	6.23
1813	6.23
1814	6.23
1815	6.23
1816	6.23
1817	6.23
1818	6.23
1819	6.23
1820	6.23
1821	6.23
1822	6.23
1823	6.23
1824	6.23
1825	6.23
1826	6.23
1827	6.23
1828	6.23
1829	6.23
1830	6.23
1831	6.23
1832	6.23
1833	6.23
1834	6.23
1835	6.23
1836	6.23
1837	6.23
1838	6.23
1839	6.23
1840	6.23
1841	6.23
1842	6.23
1843	6.23
1844	6.23
1845	6.23
1846	6.23
1847	6.23
1848	6.23
1849	6.23
1850	6.23
1851	6.23
1852	6.23
1853	6.23
1854	6.23
1855	6.23
1856	6.23
1857	6.23
1858	6.23
1859	6.23
1860	6.23
1861	6.23
1862	6.23
1863	6.23
1864	6.23
1865	6.23
1866	6.23
1867	6.23
1868	6.23
1869	6.23
1870	6.23
1871	6.23
1872	6.23
1873	6.23
1874	6.23
1875	6.23
1876	6.23
1877	6.23
1878	6.23
1879	6.23
1880	6.23
1881	6.23
1882	6.23
1883	6.23
1884	6.23
1885	6.23
1886	6.23
1887	6.23
1888	6.23
1889	6.23
1890	6.23
1891	6.23
1892	6.23
1893	6.23
1894	6.23
1895	6.23
1896	6.23
1897	6.23
1898	6.23
1899	6.23
1900	6.23
1901	6.23
1902	6.23
1903	6.23
1904	6.23
1905	6.23
1906	6.23
1907	6.23
1908	6.23
1909	6.23
1910	6.23
1911	6.23
1912	6.23
1913	6.23
1914	6.23
1915	6.23
1916	6.23
1917	6.23
1918	6.23
1919	6.23
1920	6.23
1921	6.23
1922	6.23
1923	6.23
1924	6.23
1925	6.23
1926	6.24
1927	6.24
1928	6.25
1929	6.26
1930	6.26
1931	6.27
1932	6.28
1933	6.29
1934	6.3
1935	6.31
1936	6.33
1937	6.34
1938	6.36
1939	6.38
1940	6.39
1941	6.41
1942	6.44
1943	6.46
1944	6.48
1945	6.51
1946	6.53
1947	6.56
1948	6.59
1949	6.62
1950	6.65
1951	6.68
1952	6.73
1953	6.76
1954	6.8
1955	6.83
1956	6.86
1957	6.89
1958	6.91
1959	6.94
1960	6.97
1961	6.98
1962	6.99
1963	7.01
1964	7.03
1965	7.05
1966	7.07
1967	7.09
1968	7.11
1969	7.12
1970	7.13
1971	7.14
1972	7.15
1973	7.15
1974	7.15
1975	7.15
1976	7.15
1977	7.15
1978	7.15
1979	7.15
1980	7.15
1981	7.15
1982	7.15
1983	7.15
1984	7.15
1985	7.15
1986	7.15
1987	7.16
1988	7.16
1989	7.16
1990	7.17
1991	7.16
1992	7.15
1993	7.12
1994	7.09
1995	7.06
1996	7.02
1997	6.98
1998	6.95
1999	6.92
2000	6.9
2001	6.88
2002	6.86
2003	6.84
2004	6.82
2005	6.79
2006	6.76
2007	6.72
2008	6.67
2009	6.61
2010	6.55
2011	6.47
2012	6.4
2013	6.32
2014	6.23
2015	6.15
2016	6.06
2017	5.97
2018	5.88