Year	Total
1800	5.8
1801	5.8
1802	5.8
1803	5.8
1804	5.8
1805	5.8
1806	5.8
1807	5.8
1808	5.8
1809	5.8
1810	5.8
1811	5.8
1812	5.8
1813	5.8
1814	5.8
1815	5.8
1816	5.8
1817	5.8
1818	5.8
1819	5.8
1820	5.8
1821	5.8
1822	5.8
1823	5.8
1824	5.8
1825	5.8
1826	5.8
1827	5.8
1828	5.8
1829	5.8
1830	5.8
1831	5.8
1832	5.8
1833	5.8
1834	5.8
1835	5.8
1836	5.8
1837	5.8
1838	5.8
1839	5.8
1840	5.8
1841	5.8
1842	5.8
1843	5.8
1844	5.8
1845	5.8
1846	5.8
1847	5.8
1848	5.8
1849	5.8
1850	5.8
1851	5.8
1852	5.8
1853	5.8
1854	5.8
1855	5.8
1856	5.8
1857	5.8
1858	5.8
1859	5.8
1860	5.8
1861	5.8
1862	5.8
1863	5.8
1864	5.8
1865	5.8
1866	5.8
1867	5.8
1868	5.8
1869	5.8
1870	5.8
1871	5.8
1872	5.8
1873	5.8
1874	5.8
1875	5.8
1876	5.8
1877	5.8
1878	5.8
1879	5.8
1880	5.8
1881	5.8
1882	5.8
1883	5.8
1884	5.8
1885	5.8
1886	5.8
1887	5.8
1888	5.8
1889	5.8
1890	5.8
1891	5.8
1892	5.8
1893	5.8
1894	5.8
1895	5.8
1896	5.8
1897	5.8
1898	5.8
1899	5.8
1900	5.8
1901	5.8
1902	5.8
1903	5.8
1904	5.8
1905	5.8
1906	5.8
1907	5.8
1908	5.8
1909	5.8
1910	5.8
1911	5.8
1912	5.8
1913	5.8
1914	5.8
1915	5.8
1916	5.8
1917	5.8
1918	5.8
1919	5.8
1920	5.8
1921	5.8
1922	5.8
1923	5.8
1924	5.8
1925	5.8
1926	5.8
1927	5.8
1928	5.8
1929	5.8
1930	5.8
1931	5.8
1932	5.8
1933	5.8
1934	5.8
1935	5.8
1936	5.8
1937	5.8
1938	5.8
1939	5.8
1940	5.8
1941	5.8
1942	5.8
1943	5.8
1944	5.8
1945	5.8
1946	5.8
1947	5.8
1948	5.8
1949	5.8
1950	5.8
1951	5.77
1952	5.7
1953	5.62
1954	5.53
1955	5.44
1956	5.33
1957	5.22
1958	5.1
1959	4.97
1960	4.82
1961	4.66
1962	4.47
1963	4.27
1964	4.06
1965	3.84
1966	3.63
1967	3.42
1968	3.23
1969	3.05
1970	2.91
1971	2.79
1972	2.69
1973	2.61
1974	2.55
1975	2.51
1976	2.47
1977	2.45
1978	2.43
1979	2.41
1980	2.39
1981	2.38
1982	2.36
1983	2.35
1984	2.34
1985	2.32
1986	2.32
1987	2.31
1988	2.31
1989	2.3
1990	2.3
1991	2.29
1992	2.28
1993	2.26
1994	2.23
1995	2.2
1996	2.17
1997	2.15
1998	2.13
1999	2.11
2000	2.1
2001	2.1
2002	2.09
2003	2.07
2004	2.06
2005	2.04
2006	2.02
2007	1.99
2008	1.97
2009	1.95
2010	1.94
2011	1.92
2012	1.91
2013	1.89
2014	1.88
2015	1.87
2016	1.86
2017	1.85
2018	1.84