Year	Total
1800	6.89
1801	6.89
1802	6.89
1803	6.89
1804	6.89
1805	6.89
1806	6.89
1807	6.89
1808	6.89
1809	6.89
1810	6.89
1811	6.89
1812	6.89
1813	6.89
1814	6.89
1815	6.89
1816	6.89
1817	6.89
1818	6.89
1819	6.89
1820	6.89
1821	6.89
1822	6.89
1823	6.89
1824	6.89
1825	6.89
1826	6.89
1827	6.89
1828	6.89
1829	6.89
1830	6.89
1831	6.89
1832	6.89
1833	6.89
1834	6.89
1835	6.89
1836	6.89
1837	6.89
1838	6.89
1839	6.89
1840	6.89
1841	6.89
1842	6.89
1843	6.89
1844	6.89
1845	6.89
1846	6.89
1847	6.89
1848	6.89
1849	6.89
1850	6.89
1851	6.89
1852	6.89
1853	6.89
1854	6.89
1855	6.89
1856	6.89
1857	6.89
1858	6.89
1859	6.89
1860	6.89
1861	6.89
1862	6.89
1863	6.89
1864	6.89
1865	6.89
1866	6.89
1867	6.89
1868	6.89
1869	6.89
1870	6.89
1871	6.89
1872	6.89
1873	6.89
1874	6.89
1875	6.89
1876	6.89
1877	6.89
1878	6.89
1879	6.89
1880	6.89
1881	6.89
1882	6.89
1883	6.89
1884	6.89
1885	6.89
1886	6.89
1887	6.89
1888	6.89
1889	6.89
1890	6.89
1891	6.89
1892	6.89
1893	6.89
1894	6.89
1895	6.89
1896	6.89
1897	6.89
1898	6.89
1899	6.89
1900	6.89
1901	6.89
1902	6.89
1903	6.89
1904	6.89
1905	6.89
1906	6.89
1907	6.89
1908	6.89
1909	6.89
1910	6.89
1911	6.89
1912	6.89
1913	6.89
1914	6.89
1915	6.89
1916	6.89
1917	6.89
1918	6.89
1919	6.89
1920	6.89
1921	6.89
1922	6.89
1923	6.89
1924	6.89
1925	6.89
1926	6.91
1927	6.92
1928	6.94
1929	6.96
1930	6.97
1931	6.99
1932	7
1933	7.02
1934	7.04
1935	7.05
1936	7.07
1937	7.09
1938	7.1
1939	7.12
1940	7.14
1941	7.15
1942	7.17
1943	7.19
1944	7.2
1945	7.22
1946	7.23
1947	7.25
1948	7.27
1949	7.28
1950	7.3
1951	7.3
1952	7.3
1953	7.3
1954	7.3
1955	7.3
1956	7.3
1957	7.3
1958	7.3
1959	7.3
1960	7.3
1961	7.3
1962	7.3
1963	7.31
1964	7.31
1965	7.31
1966	7.31
1967	7.3
1968	7.3
1969	7.29
1970	7.27
1971	7.25
1972	7.22
1973	7.19
1974	7.15
1975	7.1
1976	7.04
1977	6.98
1978	6.9
1979	6.81
1980	6.73
1981	6.64
1982	6.55
1983	6.48
1984	6.41
1985	6.35
1986	6.31
1987	6.27
1988	6.24
1989	6.21
1990	6.18
1991	6.15
1992	6.12
1993	6.08
1994	6.03
1995	5.98
1996	5.91
1997	5.84
1998	5.75
1999	5.65
2000	5.55
2001	5.45
2002	5.34
2003	5.24
2004	5.14
2005	5.05
2006	4.96
2007	4.87
2008	4.78
2009	4.69
2010	4.6
2011	4.52
2012	4.44
2013	4.37
2014	4.3
2015	4.24
2016	4.18
2017	4.13
2018	4.08