Year	Total
1800	6.7
1801	6.7
1802	6.7
1803	6.7
1804	6.7
1805	6.7
1806	6.7
1807	6.7
1808	6.7
1809	6.7
1810	6.7
1811	6.7
1812	6.7
1813	6.7
1814	6.7
1815	6.7
1816	6.7
1817	6.7
1818	6.7
1819	6.7
1820	6.7
1821	6.7
1822	6.7
1823	6.7
1824	6.7
1825	6.7
1826	6.7
1827	6.7
1828	6.7
1829	6.7
1830	6.7
1831	6.7
1832	6.7
1833	6.7
1834	6.7
1835	6.7
1836	6.7
1837	6.7
1838	6.7
1839	6.7
1840	6.7
1841	6.7
1842	6.7
1843	6.7
1844	6.7
1845	6.7
1846	6.7
1847	6.7
1848	6.7
1849	6.7
1850	6.7
1851	6.7
1852	6.7
1853	6.7
1854	6.7
1855	6.7
1856	6.7
1857	6.7
1858	6.7
1859	6.7
1860	6.7
1861	6.7
1862	6.7
1863	6.7
1864	6.7
1865	6.7
1866	6.7
1867	6.7
1868	6.7
1869	6.7
1870	6.7
1871	6.7
1872	6.7
1873	6.7
1874	6.7
1875	6.7
1876	6.7
1877	6.7
1878	6.7
1879	6.7
1880	6.7
1881	6.7
1882	6.7
1883	6.7
1884	6.7
1885	6.7
1886	6.7
1887	6.7
1888	6.7
1889	6.7
1890	6.7
1891	6.7
1892	6.7
1893	6.7
1894	6.7
1895	6.7
1896	6.7
1897	6.7
1898	6.7
1899	6.7
1900	6.7
1901	6.7
1902	6.7
1903	6.7
1904	6.7
1905	6.7
1906	6.7
1907	6.7
1908	6.7
1909	6.7
1910	6.7
1911	6.7
1912	6.7
1913	6.7
1914	6.7
1915	6.7
1916	6.7
1917	6.7
1918	6.7
1919	6.7
1920	6.7
1921	6.7
1922	6.7
1923	6.7
1924	6.7
1925	6.7
1926	6.68
1927	6.66
1928	6.64
1929	6.63
1930	6.61
1931	6.59
1932	6.57
1933	6.55
1934	6.53
1935	6.51
1936	6.49
1937	6.48
1938	6.46
1939	6.44
1940	6.42
1941	6.4
1942	6.38
1943	6.36
1944	6.35
1945	6.33
1946	6.31
1947	6.29
1948	6.27
1949	6.25
1950	6.23
1951	6.27
1952	6.33
1953	6.39
1954	6.45
1955	6.5
1956	6.56
1957	6.6
1958	6.65
1959	6.69
1960	6.73
1961	6.76
1962	6.79
1963	6.83
1964	6.85
1965	6.88
1966	6.9
1967	6.92
1968	6.94
1969	6.95
1970	6.95
1971	6.94
1972	6.93
1973	6.9
1974	6.87
1975	6.82
1976	6.76
1977	6.68
1978	6.59
1979	6.48
1980	6.36
1981	6.22
1982	6.06
1983	5.89
1984	5.71
1985	5.52
1986	5.33
1987	5.13
1988	4.93
1989	4.74
1990	4.55
1991	4.37
1992	4.2
1993	4.03
1994	3.88
1995	3.73
1996	3.6
1997	3.47
1998	3.35
1999	3.23
2000	3.12
2001	3.01
2002	2.91
2003	2.8
2004	2.7
2005	2.61
2006	2.52
2007	2.44
2008	2.38
2009	2.32
2010	2.28
2011	2.24
2012	2.21
2013	2.18
2014	2.16
2015	2.13
2016	2.1
2017	2.08
2018	2.05