Year	Total
1800	6.91
1801	6.91
1802	6.91
1803	6.91
1804	6.91
1805	6.91
1806	6.91
1807	6.91
1808	6.91
1809	6.91
1810	6.91
1811	6.91
1812	6.91
1813	6.91
1814	6.91
1815	6.91
1816	6.91
1817	6.91
1818	6.91
1819	6.91
1820	6.91
1821	6.91
1822	6.91
1823	6.91
1824	6.91
1825	6.91
1826	6.91
1827	6.91
1828	6.91
1829	6.91
1830	6.91
1831	6.91
1832	6.91
1833	6.91
1834	6.91
1835	6.91
1836	6.91
1837	6.91
1838	6.91
1839	6.91
1840	6.91
1841	6.91
1842	6.91
1843	6.91
1844	6.91
1845	6.91
1846	6.91
1847	6.91
1848	6.91
1849	6.91
1850	6.91
1851	6.91
1852	6.91
1853	6.91
1854	6.91
1855	6.91
1856	6.91
1857	6.91
1858	6.91
1859	6.91
1860	6.91
1861	6.91
1862	6.91
1863	6.91
1864	6.91
1865	6.91
1866	6.91
1867	6.91
1868	6.91
1869	6.91
1870	6.91
1871	6.91
1872	6.91
1873	6.91
1874	6.91
1875	6.91
1876	6.91
1877	6.91
1878	6.91
1879	6.91
1880	6.91
1881	6.91
1882	6.91
1883	6.91
1884	6.91
1885	6.91
1886	6.91
1887	6.91
1888	6.91
1889	6.91
1890	6.91
1891	6.91
1892	6.91
1893	6.91
1894	6.91
1895	6.91
1896	6.91
1897	6.91
1898	6.91
1899	6.91
1900	6.91
1901	6.91
1902	6.91
1903	6.91
1904	6.91
1905	6.91
1906	6.91
1907	6.91
1908	6.91
1909	6.91
1910	6.91
1911	6.91
1912	6.91
1913	6.91
1914	6.91
1915	6.91
1916	6.91
1917	6.91
1918	6.91
1919	6.91
1920	6.91
1921	6.91
1922	6.91
1923	6.91
1924	6.91
1925	6.91
1926	6.93
1927	6.94
1928	6.96
1929	6.98
1930	7
1931	7.02
1932	7.03
1933	7.05
1934	7.07
1935	7.09
1936	7.11
1937	7.12
1938	7.14
1939	7.16
1940	7.18
1941	7.2
1942	7.22
1943	7.23
1944	7.25
1945	7.27
1946	7.29
1947	7.31
1948	7.32
1949	7.34
1950	7.36
1951	7.39
1952	7.45
1953	7.51
1954	7.57
1955	7.64
1956	7.7
1957	7.76
1958	7.83
1959	7.89
1960	7.95
1961	8
1962	8.04
1963	8.08
1964	8.1
1965	8.12
1966	8.13
1967	8.13
1968	8.12
1969	8.1
1970	8.08
1971	8.05
1972	8.01
1973	7.96
1974	7.91
1975	7.84
1976	7.77
1977	7.7
1978	7.62
1979	7.54
1980	7.46
1981	7.37
1982	7.27
1983	7.16
1984	7.04
1985	6.91
1986	6.76
1987	6.6
1988	6.43
1989	6.24
1990	6.07
1991	5.9
1992	5.76
1993	5.63
1994	5.54
1995	5.46
1996	5.4
1997	5.35
1998	5.3
1999	5.24
2000	5.18
2001	5.11
2002	5.04
2003	4.98
2004	4.91
2005	4.84
2006	4.76
2007	4.68
2008	4.58
2009	4.48
2010	4.37
2011	4.27
2012	4.17
2013	4.07
2014	3.99
2015	3.92
2016	3.85
2017	3.79
2018	3.74