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	6.89
1927	6.91
1928	6.92
1929	6.94
1930	6.95
1931	6.97
1932	6.98
1933	7
1934	7.01
1935	7.03
1936	7.04
1937	7.06
1938	7.07
1939	7.09
1940	7.1
1941	7.12
1942	7.13
1943	7.15
1944	7.16
1945	7.18
1946	7.19
1947	7.21
1948	7.22
1949	7.24
1950	7.25
1951	7.25
1952	7.25
1953	7.25
1954	7.25
1955	7.25
1956	7.25
1957	7.25
1958	7.25
1959	7.25
1960	7.25
1961	7.25
1962	7.25
1963	7.26
1964	7.26
1965	7.27
1966	7.28
1967	7.28
1968	7.29
1969	7.29
1970	7.31
1971	7.35
1972	7.41
1973	7.5
1974	7.62
1975	7.75
1976	7.89
1977	8.02
1978	8.14
1979	8.23
1980	8.3
1981	8.34
1982	8.35
1983	8.34
1984	8.3
1985	8.22
1986	8.1
1987	7.93
1988	7.72
1989	7.46
1990	7.17
1991	6.83
1992	6.47
1993	6.1
1994	5.72
1995	5.35
1996	4.98
1997	4.63
1998	4.3
1999	3.99
2000	3.72
2001	3.48
2002	3.29
2003	3.14
2004	3.03
2005	2.95
2006	2.91
2007	2.89
2008	2.89
2009	2.9
2010	2.9
2011	2.9
2012	2.88
2013	2.85
2014	2.8
2015	2.74
2016	2.67
2017	2.59
2018	2.52