Year	Total
1800	5.55
1801	5.55
1802	5.55
1803	5.55
1804	5.55
1805	5.55
1806	5.56
1807	5.56
1808	5.56
1809	5.56
1810	5.56
1811	5.56
1812	5.56
1813	5.56
1814	5.56
1815	5.56
1816	5.56
1817	5.56
1818	5.57
1819	5.57
1820	5.57
1821	5.57
1822	5.57
1823	5.57
1824	5.57
1825	5.57
1826	5.57
1827	5.57
1828	5.57
1829	5.58
1830	5.58
1831	5.58
1832	5.58
1833	5.58
1834	5.58
1835	5.58
1836	5.58
1837	5.58
1838	5.58
1839	5.58
1840	5.59
1841	5.59
1842	5.59
1843	5.59
1844	5.59
1845	5.59
1846	5.59
1847	5.59
1848	5.59
1849	5.59
1850	5.59
1851	5.59
1852	5.6
1853	5.6
1854	5.6
1855	5.6
1856	5.6
1857	5.6
1858	5.6
1859	5.6
1860	5.6
1861	5.6
1862	5.6
1863	5.61
1864	5.61
1865	5.61
1866	5.61
1867	5.61
1868	5.61
1869	5.61
1870	5.61
1871	5.61
1872	5.61
1873	5.61
1874	5.62
1875	5.62
1876	5.62
1877	5.62
1878	5.62
1879	5.62
1880	5.62
1881	5.62
1882	5.62
1883	5.62
1884	5.62
1885	5.62
1886	5.63
1887	5.63
1888	5.63
1889	5.63
1890	5.63
1891	5.63
1892	5.63
1893	5.63
1894	5.63
1895	5.63
1896	5.63
1897	5.64
1898	5.64
1899	5.64
1900	5.64
1901	5.64
1902	5.64
1903	5.64
1904	5.64
1905	5.64
1906	5.64
1907	5.64
1908	5.65
1909	5.65
1910	5.65
1911	5.65
1912	5.65
1913	5.65
1914	5.65
1915	5.65
1916	5.65
1917	5.65
1918	5.65
1919	5.65
1920	5.66
1921	5.66
1922	5.66
1923	5.66
1924	5.66
1925	5.66
1926	5.66
1927	5.67
1928	5.67
1929	5.67
1930	5.68
1931	5.68
1932	5.69
1933	5.69
1934	5.69
1935	5.7
1936	5.7
1937	5.7
1938	5.71
1939	5.71
1940	5.71
1941	5.72
1942	5.72
1943	5.73
1944	5.73
1945	5.73
1946	5.74
1947	5.74
1948	5.74
1949	5.75
1950	5.75
1951	5.78
1952	5.83
1953	5.88
1954	5.94
1955	5.99
1956	6.05
1957	6.11
1958	6.17
1959	6.23
1960	6.28
1961	6.34
1962	6.39
1963	6.45
1964	6.5
1965	6.54
1966	6.59
1967	6.63
1968	6.67
1969	6.71
1970	6.75
1971	6.79
1972	6.82
1973	6.86
1974	6.9
1975	6.93
1976	6.96
1977	6.98
1978	7
1979	7.02
1980	7.03
1981	7.03
1982	7.02
1983	7.01
1984	6.99
1985	6.97
1986	6.94
1987	6.9
1988	6.86
1989	6.81
1990	6.74
1991	6.68
1992	6.6
1993	6.53
1994	6.45
1995	6.36
1996	6.28
1997	6.2
1998	6.12
1999	6.04
2000	5.96
2001	5.89
2002	5.82
2003	5.75
2004	5.69
2005	5.63
2006	5.58
2007	5.52
2008	5.47
2009	5.42
2010	5.36
2011	5.31
2012	5.25
2013	5.18
2014	5.12
2015	5.05
2016	4.98
2017	4.91
2018	4.84