Year	Total
1800	5.13
1801	5.13
1802	5.13
1803	5.13
1804	5.13
1805	5.13
1806	5.13
1807	5.13
1808	5.13
1809	5.13
1810	5.13
1811	5.13
1812	5.13
1813	5.13
1814	5.13
1815	5.13
1816	5.13
1817	5.13
1818	5.13
1819	5.13
1820	5.13
1821	5.13
1822	5.13
1823	5.13
1824	5.13
1825	5.13
1826	5.13
1827	5.13
1828	5.13
1829	5.13
1830	5.13
1831	5.13
1832	5.13
1833	5.13
1834	5.13
1835	5.13
1836	5.13
1837	5.13
1838	5.13
1839	5.13
1840	5.13
1841	5.13
1842	5.13
1843	5.13
1844	5.13
1845	5.13
1846	5.13
1847	5.13
1848	5.13
1849	5.13
1850	5.13
1851	5.13
1852	5.13
1853	5.13
1854	5.13
1855	5.13
1856	5.13
1857	5.13
1858	5.13
1859	5.13
1860	5.13
1861	5.13
1862	5.13
1863	5.13
1864	5.13
1865	5.13
1866	5.13
1867	5.13
1868	5.13
1869	5.13
1870	5.13
1871	5.06
1872	4.99
1873	4.92
1874	4.85
1875	4.78
1876	4.71
1877	4.64
1878	4.57
1879	4.5
1880	5.13
1881	5.13
1882	5.12
1883	5.12
1884	5.11
1885	5.11
1886	5.12
1887	5.13
1888	5.15
1889	5.16
1890	5.17
1891	5.18
1892	5.18
1893	5.19
1894	5.19
1895	5.2
1896	5.12
1897	5.03
1898	4.95
1899	4.87
1900	4.78
1901	4.88
1902	4.98
1903	5.08
1904	5.18
1905	5.28
1906	5.26
1907	5.23
1908	5.21
1909	5.18
1910	5.16
1911	5.08
1912	5
1913	4.92
1914	4.84
1915	4.76
1916	4.93
1917	5.11
1918	5.29
1919	5.46
1920	5.64
1921	5.45
1922	5.26
1923	5.06
1924	4.87
1925	4.68
1926	4.75
1927	4.82
1928	4.89
1929	4.96
1930	5.03
1931	4.93
1932	4.84
1933	4.75
1934	4.66
1935	4.57
1936	4.48
1937	4.39
1938	4.3
1939	4.22
1940	4.13
1941	4.11
1942	4.08
1943	4.06
1944	4.04
1945	4.02
1946	3.98
1947	3.93
1948	3.89
1949	3.85
1950	3.8
1951	3.91
1952	4.13
1953	4.33
1954	4.52
1955	4.7
1956	4.87
1957	5.02
1958	5.17
1959	5.3
1960	5.42
1961	5.53
1962	5.63
1963	5.71
1964	5.78
1965	5.82
1966	5.82
1967	5.79
1968	5.72
1969	5.62
1970	5.48
1971	5.31
1972	5.11
1973	4.9
1974	4.69
1975	4.48
1976	4.29
1977	4.12
1978	3.97
1979	3.84
1980	3.73
1981	3.64
1982	3.56
1983	3.48
1984	3.39
1985	3.31
1986	3.22
1987	3.14
1988	3.07
1989	3
1990	2.95
1991	2.9
1992	2.86
1993	2.83
1994	2.8
1995	2.77
1996	2.74
1997	2.7
1998	2.67
1999	2.62
2000	2.58
2001	2.53
2002	2.48
2003	2.44
2004	2.4
2005	2.36
2006	2.33
2007	2.29
2008	2.25
2009	2.21
2010	2.17
2011	2.14
2012	2.1
2013	2.07
2014	2.05
2015	2.03
2016	2.01
2017	1.99
2018	1.98