Year	Total
1800	5.5
1801	5.5
1802	5.5
1803	5.5
1804	5.5
1805	5.5
1806	5.5
1807	5.5
1808	5.5
1809	5.5
1810	5.5
1811	5.5
1812	5.5
1813	5.5
1814	5.5
1815	5.5
1816	5.5
1817	5.5
1818	5.5
1819	5.5
1820	5.5
1821	5.5
1822	5.5
1823	5.5
1824	5.5
1825	5.5
1826	5.5
1827	5.5
1828	5.5
1829	5.5
1830	5.5
1831	5.5
1832	5.5
1833	5.5
1834	5.5
1835	5.5
1836	5.5
1837	5.5
1838	5.5
1839	5.5
1840	5.5
1841	5.5
1842	5.5
1843	5.5
1844	5.5
1845	5.5
1846	5.5
1847	5.5
1848	5.5
1849	5.5
1850	5.5
1851	5.5
1852	5.5
1853	5.5
1854	5.5
1855	5.5
1856	5.5
1857	5.5
1858	5.5
1859	5.5
1860	5.5
1861	5.5
1862	5.5
1863	5.5
1864	5.5
1865	5.5
1866	5.5
1867	5.5
1868	5.5
1869	5.5
1870	5.5
1871	5.5
1872	5.5
1873	5.5
1874	5.5
1875	5.5
1876	5.5
1877	5.5
1878	5.5
1879	5.5
1880	5.5
1881	5.5
1882	5.5
1883	5.5
1884	5.5
1885	5.5
1886	5.5
1887	5.5
1888	5.5
1889	5.5
1890	5.5
1891	5.5
1892	5.5
1893	5.5
1894	5.5
1895	5.5
1896	5.5
1897	5.5
1898	5.5
1899	5.5
1900	5.5
1901	5.5
1902	5.5
1903	5.5
1904	5.5
1905	5.5
1906	5.5
1907	5.5
1908	5.5
1909	5.5
1910	5.5
1911	5.5
1912	5.5
1913	5.5
1914	5.5
1915	5.5
1916	5.5
1917	5.5
1918	5.5
1919	5.5
1920	5.5
1921	5.5
1922	5.5
1923	5.5
1924	5.5
1925	5.5
1926	5.5
1927	5.5
1928	5.5
1929	5.5
1930	5.5
1931	5.48
1932	5.45
1933	5.43
1934	5.4
1935	5.38
1936	5.35
1937	5.33
1938	5.3
1939	5.28
1940	5.25
1941	5.15
1942	5.06
1943	4.96
1944	4.86
1945	4.77
1946	5
1947	5.2
1948	4.91
1949	5.54
1950	5.29
1951	5.26
1952	5.97
1953	5.67
1954	5.96
1955	5.98
1956	5.61
1957	6.21
1958	5.5
1959	4.27
1960	3.99
1961	3.28
1962	5.97
1963	7.41
1964	6.12
1965	6.02
1966	6.21
1967	5.25
1968	6.37
1969	5.67
1970	5.75
1971	5.4
1972	4.92
1973	4.51
1974	4.15
1975	3.58
1976	3.25
1977	2.87
1978	2.74
1979	2.8
1980	2.32
1981	2.67
1982	2.58
1983	2.58
1984	2.62
1985	2.66
1986	2.68
1987	2.65
1988	2.59
1989	2.49
1990	2.35
1991	2.19
1992	2.02
1993	1.87
1994	1.74
1995	1.64
1996	1.57
1997	1.53
1998	1.5
1999	1.49
2000	1.5
2001	1.51
2002	1.52
2003	1.54
2004	1.55
2005	1.57
2006	1.57
2007	1.58
2008	1.58
2009	1.59
2010	1.59
2011	1.59
2012	1.6
2013	1.6
2014	1.61
2015	1.62
2016	1.62
2017	1.63
2018	1.64