Year	Total
1800	6.16
1801	6.16
1802	6.16
1803	6.16
1804	6.16
1805	6.16
1806	6.16
1807	6.16
1808	6.16
1809	6.16
1810	6.16
1811	6.16
1812	6.16
1813	6.16
1814	6.16
1815	6.16
1816	6.16
1817	6.16
1818	6.16
1819	6.16
1820	6.16
1821	6.16
1822	6.16
1823	6.16
1824	6.16
1825	6.16
1826	6.16
1827	6.16
1828	6.16
1829	6.16
1830	6.16
1831	6.16
1832	6.16
1833	6.16
1834	6.16
1835	6.16
1836	6.16
1837	6.16
1838	6.16
1839	6.16
1840	6.16
1841	6.16
1842	6.16
1843	6.16
1844	6.16
1845	6.16
1846	6.16
1847	6.16
1848	6.16
1849	6.16
1850	6.16
1851	6.16
1852	6.16
1853	6.16
1854	6.16
1855	6.16
1856	6.16
1857	6.16
1858	6.16
1859	6.16
1860	6.16
1861	6.16
1862	6.16
1863	6.16
1864	6.16
1865	6.16
1866	6.16
1867	6.16
1868	6.16
1869	6.16
1870	6.16
1871	6.16
1872	6.16
1873	6.16
1874	6.16
1875	6.16
1876	6.16
1877	6.16
1878	6.16
1879	6.16
1880	6.16
1881	6.16
1882	6.16
1883	6.16
1884	6.16
1885	6.16
1886	6.16
1887	6.16
1888	6.16
1889	6.16
1890	6.16
1891	6.16
1892	6.16
1893	6.16
1894	6.16
1895	6.16
1896	6.16
1897	6.16
1898	6.16
1899	6.16
1900	6.16
1901	6.16
1902	6.16
1903	6.16
1904	6.16
1905	6.16
1906	6.16
1907	6.16
1908	6.16
1909	6.16
1910	6.16
1911	6.16
1912	6.16
1913	6.16
1914	6.16
1915	6.16
1916	6.16
1917	6.16
1918	6.16
1919	6.16
1920	6.16
1921	6.16
1922	6.16
1923	6.16
1924	6.16
1925	6.16
1926	6.16
1927	6.16
1928	6.16
1929	6.16
1930	6.16
1931	6.16
1932	6.16
1933	6.16
1934	6.16
1935	6.16
1936	6.21
1937	6.26
1938	6.31
1939	6.36
1940	6.4
1941	6.45
1942	6.5
1943	6.55
1944	6.6
1945	6.64
1946	6.69
1947	6.74
1948	6.79
1949	6.84
1950	6.88
1951	6.98
1952	7.16
1953	7.3
1954	7.4
1955	7.47
1956	7.5
1957	7.5
1958	7.46
1959	7.41
1960	7.34
1961	7.26
1962	7.18
1963	7.11
1964	7.05
1965	7.01
1966	6.98
1967	6.96
1968	6.94
1969	6.92
1970	6.89
1971	6.86
1972	6.81
1973	6.75
1974	6.68
1975	6.6
1976	6.51
1977	6.42
1978	6.33
1979	6.23
1980	6.13
1981	6.02
1982	5.9
1983	5.76
1984	5.61
1985	5.45
1986	5.28
1987	5.1
1988	4.93
1989	4.76
1990	4.6
1991	4.43
1992	4.27
1993	4.11
1994	3.94
1995	3.78
1996	3.62
1997	3.47
1998	3.33
1999	3.2
2000	3.08
2001	2.98
2002	2.89
2003	2.81
2004	2.74
2005	2.68
2006	2.62
2007	2.57
2008	2.52
2009	2.48
2010	2.43
2011	2.38
2012	2.34
2013	2.3
2014	2.26
2015	2.23
2016	2.2
2017	2.17
2018	2.14