Year	Total
1800	5.47
1801	5.47
1802	5.46
1803	5.46
1804	5.46
1805	5.45
1806	5.45
1807	5.44
1808	5.44
1809	5.44
1810	5.43
1811	5.43
1812	5.43
1813	5.42
1814	5.42
1815	5.42
1816	5.41
1817	5.41
1818	5.4
1819	5.4
1820	5.4
1821	5.39
1822	5.39
1823	5.39
1824	5.38
1825	5.38
1826	5.37
1827	5.37
1828	5.37
1829	5.36
1830	5.36
1831	5.36
1832	5.35
1833	5.35
1834	5.35
1835	5.34
1836	5.34
1837	5.33
1838	5.33
1839	5.33
1840	5.32
1841	5.32
1842	5.32
1843	5.31
1844	5.31
1845	5.31
1846	5.3
1847	5.3
1848	5.29
1849	5.29
1850	5.29
1851	5.28
1852	5.28
1853	5.28
1854	5.27
1855	5.27
1856	5.26
1857	5.26
1858	5.26
1859	5.25
1860	5.25
1861	5.25
1862	5.24
1863	5.24
1864	5.24
1865	5.23
1866	5.23
1867	5.22
1868	5.22
1869	5.22
1870	5.21
1871	5.21
1872	5.21
1873	5.2
1874	5.2
1875	5.2
1876	5.19
1877	5.19
1878	5.18
1879	5.18
1880	5.18
1881	5.17
1882	5.17
1883	5.17
1884	5.28
1885	5.39
1886	5.51
1887	5.62
1888	5.73
1889	5.71
1890	5.69
1891	5.68
1892	5.66
1893	5.64
1894	5.62
1895	5.6
1896	5.58
1897	5.57
1898	5.55
1899	5.53
1900	5.51
1901	5.49
1902	5.47
1903	5.46
1904	5.44
1905	5.42
1906	5.41
1907	5.39
1908	5.38
1909	5.38
1910	5.39
1911	5.39
1912	5.39
1913	5.4
1914	5.44
1915	5.49
1916	5.53
1917	5.58
1918	5.62
1919	5.68
1920	5.73
1921	5.78
1922	5.83
1923	5.89
1924	6
1925	6.12
1926	6.23
1927	6.35
1928	6.46
1929	6.61
1930	6.76
1931	6.9
1932	7.05
1933	7.19
1934	7.29
1935	7.39
1936	7.48
1937	7.58
1938	7.68
1939	7.29
1940	6.9
1941	6.51
1942	6.12
1943	5.72
1944	5.9
1945	6.08
1946	6.25
1947	6.43
1948	6.6
1949	6.55
1950	6.49
1951	6.54
1952	6.62
1953	6.66
1954	6.66
1955	6.62
1956	6.54
1957	6.42
1958	6.25
1959	6.06
1960	5.82
1961	5.56
1962	5.27
1963	4.97
1964	4.66
1965	4.36
1966	4.07
1967	3.82
1968	3.58
1969	3.38
1970	3.19
1971	3.01
1972	2.84
1973	2.65
1974	2.46
1975	2.27
1976	2.1
1977	1.95
1978	1.83
1979	1.74
1980	1.82
1981	1.78
1982	1.74
1983	1.61
1984	1.62
1985	1.61
1986	1.43
1987	1.62
1988	1.96
1989	1.75
1990	1.83
1991	1.73
1992	1.72
1993	1.74
1994	1.71
1995	1.67
1996	1.66
1997	1.61
1998	1.48
1999	1.47
2000	1.6
2001	1.41
2002	1.37
2003	1.27
2004	1.26
2005	1.26
2006	1.28
2007	1.29
2008	1.28
2009	1.26
2010	1.26
2011	1.26
2012	1.26
2013	1.25
2014	1.25
2015	1.24
2016	1.25
2017	1.25
2018	1.26