Year	Total
1800	6.13
1801	6.13
1802	6.13
1803	6.13
1804	6.13
1805	6.13
1806	6.13
1807	6.13
1808	6.13
1809	6.13
1810	6.13
1811	6.13
1812	6.13
1813	6.13
1814	6.13
1815	6.13
1816	6.13
1817	6.13
1818	6.13
1819	6.13
1820	6.13
1821	6.13
1822	6.13
1823	6.13
1824	6.13
1825	6.13
1826	6.13
1827	6.13
1828	6.13
1829	6.13
1830	6.13
1831	6.13
1832	6.13
1833	6.13
1834	6.13
1835	6.13
1836	6.13
1837	6.13
1838	6.13
1839	6.13
1840	6.13
1841	6.13
1842	6.13
1843	6.13
1844	6.13
1845	6.13
1846	6.13
1847	6.13
1848	6.13
1849	6.13
1850	6.13
1851	6.13
1852	6.13
1853	6.13
1854	6.13
1855	6.13
1856	6.13
1857	6.13
1858	6.13
1859	6.13
1860	6.13
1861	6.13
1862	6.13
1863	6.13
1864	6.13
1865	6.13
1866	6.13
1867	6.13
1868	6.13
1869	6.13
1870	6.13
1871	6.13
1872	6.13
1873	6.13
1874	6.13
1875	6.13
1876	6.13
1877	6.13
1878	6.13
1879	6.13
1880	6.13
1881	6.13
1882	6.13
1883	6.13
1884	6.13
1885	6.13
1886	6.13
1887	6.13
1888	6.13
1889	6.13
1890	6.13
1891	6.13
1892	6.13
1893	6.13
1894	6.13
1895	6.13
1896	6.13
1897	6.13
1898	6.13
1899	6.13
1900	6.13
1901	6.13
1902	6.13
1903	6.13
1904	6.13
1905	6.13
1906	6.13
1907	6.13
1908	6.13
1909	6.13
1910	6.13
1911	6.13
1912	6.13
1913	6.13
1914	6.13
1915	6.13
1916	6.13
1917	6.13
1918	6.13
1919	6.13
1920	6.13
1921	6.13
1922	6.13
1923	6.13
1924	6.13
1925	6.13
1926	6.12
1927	6.11
1928	6.11
1929	6.1
1930	6.09
1931	6.08
1932	6.08
1933	6.07
1934	6.06
1935	6.05
1936	6.05
1937	6.04
1938	6.03
1939	6.02
1940	6.01
1941	6.01
1942	6
1943	5.99
1944	5.98
1945	5.98
1946	5.97
1947	5.96
1948	5.95
1949	5.95
1950	5.94
1951	5.94
1952	5.94
1953	5.94
1954	5.95
1955	5.95
1956	5.95
1957	5.95
1958	5.96
1959	5.96
1960	5.96
1961	5.96
1962	5.97
1963	5.97
1964	5.97
1965	5.97
1966	5.97
1967	5.97
1968	5.97
1969	5.97
1970	5.97
1971	5.98
1972	5.99
1973	6.01
1974	6.03
1975	6.06
1976	6.1
1977	6.14
1978	6.19
1979	6.23
1980	6.28
1981	6.32
1982	6.35
1983	6.36
1984	6.37
1985	6.36
1986	6.34
1987	6.31
1988	6.27
1989	6.22
1990	6.15
1991	6.05
1992	5.93
1993	5.77
1994	5.59
1995	5.39
1996	5.17
1997	4.94
1998	4.72
1999	4.51
2000	4.31
2001	4.14
2002	3.98
2003	3.85
2004	3.72
2005	3.62
2006	3.52
2007	3.42
2008	3.33
2009	3.24
2010	3.15
2011	3.06
2012	2.97
2013	2.9
2014	2.82
2015	2.76
2016	2.7
2017	2.64
2018	2.59