Year	Total
1800	6.86
1801	6.86
1802	6.86
1803	6.86
1804	6.86
1805	6.86
1806	6.86
1807	6.86
1808	6.86
1809	6.86
1810	6.86
1811	6.86
1812	6.86
1813	6.86
1814	6.86
1815	6.86
1816	6.86
1817	6.86
1818	6.86
1819	6.86
1820	6.86
1821	6.86
1822	6.86
1823	6.86
1824	6.86
1825	6.86
1826	6.86
1827	6.86
1828	6.86
1829	6.86
1830	6.86
1831	6.86
1832	6.86
1833	6.86
1834	6.86
1835	6.86
1836	6.86
1837	6.86
1838	6.86
1839	6.86
1840	6.86
1841	6.86
1842	6.86
1843	6.86
1844	6.86
1845	6.86
1846	6.86
1847	6.86
1848	6.86
1849	6.86
1850	6.86
1851	6.86
1852	6.86
1853	6.86
1854	6.86
1855	6.86
1856	6.86
1857	6.86
1858	6.86
1859	6.86
1860	6.86
1861	6.86
1862	6.86
1863	6.86
1864	6.86
1865	6.86
1866	6.86
1867	6.86
1868	6.86
1869	6.86
1870	6.86
1871	6.86
1872	6.86
1873	6.86
1874	6.86
1875	6.86
1876	6.86
1877	6.86
1878	6.86
1879	6.86
1880	6.86
1881	6.86
1882	6.86
1883	6.86
1884	6.86
1885	6.86
1886	6.86
1887	6.86
1888	6.86
1889	6.86
1890	6.86
1891	6.86
1892	6.86
1893	6.86
1894	6.86
1895	6.86
1896	6.86
1897	6.86
1898	6.86
1899	6.86
1900	6.86
1901	6.86
1902	6.86
1903	6.86
1904	6.86
1905	6.86
1906	6.86
1907	6.86
1908	6.86
1909	6.86
1910	6.86
1911	6.86
1912	6.86
1913	6.86
1914	6.86
1915	6.86
1916	6.86
1917	6.86
1918	6.86
1919	6.86
1920	6.86
1921	6.86
1922	6.86
1923	6.86
1924	6.86
1925	6.86
1926	6.87
1927	6.89
1928	6.9
1929	6.91
1930	6.93
1931	6.94
1932	6.96
1933	6.97
1934	6.98
1935	7
1936	7.01
1937	7.02
1938	7.04
1939	7.05
1940	7.06
1941	7.08
1942	7.09
1943	7.1
1944	7.12
1945	7.13
1946	7.15
1947	7.16
1948	7.17
1949	7.19
1950	7.2
1951	7.19
1952	7.18
1953	7.17
1954	7.16
1955	7.16
1956	7.17
1957	7.17
1958	7.19
1959	7.2
1960	7.22
1961	7.23
1962	7.24
1963	7.25
1964	7.26
1965	7.26
1966	7.26
1967	7.26
1968	7.27
1969	7.27
1970	7.28
1971	7.29
1972	7.3
1973	7.31
1974	7.31
1975	7.31
1976	7.31
1977	7.3
1978	7.28
1979	7.25
1980	7.21
1981	7.14
1982	7.05
1983	6.93
1984	6.8
1985	6.65
1986	6.5
1987	6.34
1988	6.19
1989	6.05
1990	5.91
1991	5.76
1992	5.59
1993	5.41
1994	5.2
1995	4.98
1996	4.75
1997	4.53
1998	4.33
1999	4.14
2000	3.97
2001	3.83
2002	3.71
2003	3.6
2004	3.51
2005	3.42
2006	3.33
2007	3.24
2008	3.15
2009	3.06
2010	2.96
2011	2.87
2012	2.78
2013	2.7
2014	2.64
2015	2.58
2016	2.53
2017	2.49
2018	2.45