Year	Total
1800	6.52
1801	6.52
1802	6.52
1803	6.52
1804	6.52
1805	6.52
1806	6.52
1807	6.52
1808	6.52
1809	6.52
1810	6.52
1811	6.52
1812	6.52
1813	6.52
1814	6.52
1815	6.52
1816	6.52
1817	6.52
1818	6.52
1819	6.52
1820	6.52
1821	6.52
1822	6.52
1823	6.52
1824	6.52
1825	6.52
1826	6.52
1827	6.52
1828	6.52
1829	6.52
1830	6.52
1831	6.52
1832	6.52
1833	6.52
1834	6.52
1835	6.52
1836	6.52
1837	6.52
1838	6.52
1839	6.52
1840	6.52
1841	6.52
1842	6.52
1843	6.52
1844	6.52
1845	6.52
1846	6.52
1847	6.52
1848	6.52
1849	6.52
1850	6.52
1851	6.52
1852	6.52
1853	6.52
1854	6.52
1855	6.52
1856	6.52
1857	6.52
1858	6.52
1859	6.52
1860	6.52
1861	6.52
1862	6.52
1863	6.52
1864	6.52
1865	6.52
1866	6.52
1867	6.52
1868	6.52
1869	6.52
1870	6.52
1871	6.52
1872	6.52
1873	6.52
1874	6.52
1875	6.52
1876	6.52
1877	6.52
1878	6.52
1879	6.52
1880	6.52
1881	6.52
1882	6.52
1883	6.52
1884	6.52
1885	6.52
1886	6.52
1887	6.52
1888	6.52
1889	6.52
1890	6.52
1891	6.52
1892	6.52
1893	6.52
1894	6.52
1895	6.52
1896	6.52
1897	6.52
1898	6.52
1899	6.52
1900	6.52
1901	6.52
1902	6.52
1903	6.52
1904	6.52
1905	6.52
1906	6.52
1907	6.52
1908	6.52
1909	6.52
1910	6.52
1911	6.52
1912	6.52
1913	6.52
1914	6.52
1915	6.52
1916	6.52
1917	6.52
1918	6.52
1919	6.52
1920	6.52
1921	6.52
1922	6.52
1923	6.52
1924	6.52
1925	6.52
1926	6.52
1927	6.52
1928	6.52
1929	6.52
1930	6.52
1931	6.52
1932	6.52
1933	6.52
1934	6.52
1935	6.52
1936	6.52
1937	6.51
1938	6.51
1939	6.51
1940	6.51
1941	6.51
1942	6.51
1943	6.51
1944	6.51
1945	6.51
1946	6.51
1947	6.51
1948	6.51
1949	6.51
1950	6.51
1951	6.49
1952	6.45
1953	6.42
1954	6.4
1955	6.38
1956	6.37
1957	6.36
1958	6.37
1959	6.37
1960	6.37
1961	6.38
1962	6.38
1963	6.37
1964	6.35
1965	6.31
1966	6.27
1967	6.21
1968	6.13
1969	6.04
1970	5.92
1971	5.75
1972	5.54
1973	5.3
1974	5.04
1975	4.79
1976	4.61
1977	4.51
1978	4.51
1979	4.61
1980	4.77
1981	4.96
1982	5.13
1983	5.26
1984	5.32
1985	5.34
1986	5.31
1987	5.27
1988	5.26
1989	5.27
1990	5.34
1991	5.47
1992	5.65
1993	5.87
1994	6.13
1995	6.38
1996	6.63
1997	6.83
1998	6.99
1999	7.08
2000	7.11
2001	7.09
2002	7.04
2003	6.97
2004	6.88
2005	6.79
2006	6.69
2007	6.59
2008	6.48
2009	6.36
2010	6.23
2011	6.11
2012	5.98
2013	5.86
2014	5.74
2015	5.62
2016	5.5
2017	5.39
2018	5.28