Year	Total
1800	6.88
1801	6.88
1802	6.88
1803	6.88
1804	6.88
1805	6.88
1806	6.88
1807	6.88
1808	6.88
1809	6.88
1810	6.88
1811	6.88
1812	6.88
1813	6.88
1814	6.88
1815	6.88
1816	6.88
1817	6.88
1818	6.88
1819	6.88
1820	6.88
1821	6.88
1822	6.88
1823	6.88
1824	6.88
1825	6.88
1826	6.88
1827	6.88
1828	6.88
1829	6.88
1830	6.88
1831	6.88
1832	6.88
1833	6.88
1834	6.88
1835	6.88
1836	6.88
1837	6.88
1838	6.88
1839	6.88
1840	6.88
1841	6.88
1842	6.88
1843	6.88
1844	6.88
1845	6.88
1846	6.88
1847	6.88
1848	6.88
1849	6.88
1850	6.88
1851	6.88
1852	6.88
1853	6.88
1854	6.88
1855	6.88
1856	6.88
1857	6.88
1858	6.88
1859	6.88
1860	6.88
1861	6.88
1862	6.88
1863	6.88
1864	6.88
1865	6.88
1866	6.88
1867	6.88
1868	6.88
1869	6.88
1870	6.88
1871	6.88
1872	6.88
1873	6.88
1874	6.88
1875	6.88
1876	6.88
1877	6.88
1878	6.88
1879	6.88
1880	6.88
1881	6.88
1882	6.88
1883	6.88
1884	6.88
1885	6.88
1886	6.88
1887	6.88
1888	6.88
1889	6.88
1890	6.88
1891	6.88
1892	6.88
1893	6.88
1894	6.88
1895	6.88
1896	6.88
1897	6.88
1898	6.88
1899	6.88
1900	6.88
1901	6.88
1902	6.88
1903	6.88
1904	6.88
1905	6.88
1906	6.88
1907	6.88
1908	6.88
1909	6.88
1910	6.88
1911	6.88
1912	6.88
1913	6.88
1914	6.88
1915	6.88
1916	6.88
1917	6.88
1918	6.88
1919	6.88
1920	6.88
1921	6.88
1922	6.88
1923	6.88
1924	6.88
1925	6.88
1926	6.9
1927	6.91
1928	6.93
1929	6.94
1930	6.96
1931	6.98
1932	6.99
1933	7.01
1934	7.02
1935	7.04
1936	7.06
1937	7.08
1938	7.09
1939	7.11
1940	7.13
1941	7.15
1942	7.16
1943	7.18
1944	7.2
1945	7.22
1946	7.24
1947	7.26
1948	7.28
1949	7.3
1950	7.32
1951	7.32
1952	7.31
1953	7.31
1954	7.32
1955	7.33
1956	7.34
1957	7.37
1958	7.4
1959	7.44
1960	7.49
1961	7.53
1962	7.58
1963	7.62
1964	7.67
1965	7.71
1966	7.74
1967	7.76
1968	7.78
1969	7.79
1970	7.81
1971	7.85
1972	7.92
1973	8
1974	8.12
1975	8.24
1976	8.38
1977	8.5
1978	8.61
1979	8.69
1980	8.75
1981	8.8
1982	8.83
1983	8.85
1984	8.86
1985	8.87
1986	8.86
1987	8.83
1988	8.79
1989	8.71
1990	8.61
1991	8.46
1992	8.27
1993	8.05
1994	7.8
1995	7.53
1996	7.25
1997	6.99
1998	6.74
1999	6.51
2000	6.31
2001	6.13
2002	5.95
2003	5.78
2004	5.6
2005	5.43
2006	5.25
2007	5.09
2008	4.94
2009	4.8
2010	4.67
2011	4.55
2012	4.44
2013	4.33
2014	4.22
2015	4.1
2016	4
2017	3.89
2018	3.79