Year	Total
1800	6.6
1801	6.6
1802	6.6
1803	6.6
1804	6.6
1805	6.6
1806	6.6
1807	6.6
1808	6.6
1809	6.6
1810	6.6
1811	6.6
1812	6.6
1813	6.6
1814	6.6
1815	6.6
1816	6.6
1817	6.6
1818	6.6
1819	6.6
1820	6.6
1821	6.6
1822	6.6
1823	6.6
1824	6.6
1825	6.6
1826	6.6
1827	6.6
1828	6.6
1829	6.6
1830	6.6
1831	6.6
1832	6.6
1833	6.6
1834	6.6
1835	6.6
1836	6.6
1837	6.6
1838	6.6
1839	6.6
1840	6.6
1841	6.6
1842	6.6
1843	6.6
1844	6.6
1845	6.6
1846	6.6
1847	6.6
1848	6.6
1849	6.6
1850	6.6
1851	6.6
1852	6.6
1853	6.6
1854	6.6
1855	6.6
1856	6.6
1857	6.6
1858	6.6
1859	6.6
1860	6.6
1861	6.6
1862	6.6
1863	6.6
1864	6.6
1865	6.6
1866	6.6
1867	6.6
1868	6.6
1869	6.6
1870	6.6
1871	6.6
1872	6.6
1873	6.6
1874	6.6
1875	6.6
1876	6.6
1877	6.6
1878	6.6
1879	6.6
1880	6.6
1881	6.6
1882	6.6
1883	6.6
1884	6.6
1885	6.6
1886	6.6
1887	6.6
1888	6.6
1889	6.6
1890	6.6
1891	6.6
1892	6.6
1893	6.6
1894	6.6
1895	6.6
1896	6.6
1897	6.6
1898	6.6
1899	6.6
1900	6.6
1901	6.6
1902	6.6
1903	6.6
1904	6.6
1905	6.6
1906	6.6
1907	6.6
1908	6.6
1909	6.6
1910	6.6
1911	6.6
1912	6.6
1913	6.6
1914	6.6
1915	6.6
1916	6.6
1917	6.6
1918	6.6
1919	6.6
1920	6.6
1921	6.6
1922	6.6
1923	6.6
1924	6.6
1925	6.6
1926	6.64
1927	6.69
1928	6.73
1929	6.77
1930	6.82
1931	6.86
1932	6.9
1933	6.95
1934	6.99
1935	7.03
1936	7.08
1937	7.12
1938	7.16
1939	7.21
1940	7.25
1941	7.29
1942	7.34
1943	7.38
1944	7.42
1945	7.47
1946	7.51
1947	7.55
1948	7.6
1949	7.64
1950	7.68
1951	7.66
1952	7.62
1953	7.58
1954	7.54
1955	7.49
1956	7.44
1957	7.39
1958	7.33
1959	7.27
1960	7.2
1961	7.12
1962	7.03
1963	6.94
1964	6.84
1965	6.73
1966	6.63
1967	6.53
1968	6.43
1969	6.35
1970	6.27
1971	6.2
1972	6.13
1973	6.07
1974	6
1975	5.93
1976	5.86
1977	5.79
1978	5.72
1979	5.65
1980	5.58
1981	5.5
1982	5.43
1983	5.36
1984	5.28
1985	5.21
1986	5.14
1987	5.08
1988	5.02
1989	4.97
1990	4.93
1991	4.89
1992	4.85
1993	4.81
1994	4.78
1995	4.73
1996	4.68
1997	4.61
1998	4.54
1999	4.46
2000	4.37
2001	4.27
2002	4.16
2003	4.06
2004	3.95
2005	3.85
2006	3.76
2007	3.68
2008	3.61
2009	3.55
2010	3.5
2011	3.46
2012	3.42
2013	3.38
2014	3.35
2015	3.31
2016	3.28
2017	3.24
2018	3.2