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	5.07
1852	5.01
1853	4.95
1854	4.89
1855	4.83
1856	4.78
1857	4.72
1858	4.66
1859	4.75
1860	4.86
1861	5.16
1862	5.09
1863	5
1864	5.19
1865	5.11
1866	5.07
1867	5.09
1868	4.72
1869	4.9
1870	4.84
1871	4.83
1872	4.83
1873	4.82
1874	4.81
1875	4.8
1876	4.79
1877	4.78
1878	4.78
1879	4.74
1880	4.7
1881	4.91
1882	4.79
1883	4.71
1884	4.86
1885	4.8
1886	4.86
1887	4.78
1888	4.82
1889	4.82
1890	4.55
1891	4.67
1892	4.71
1893	4.71
1894	4.6
1895	4.63
1896	4.75
1897	4.51
1898	4.41
1899	4.53
1900	4.49
1901	4.71
1902	4.7
1903	4.69
1904	4.67
1905	4.66
1906	4.61
1907	4.57
1908	4.52
1909	4.48
1910	4.43
1911	4.39
1912	4.35
1913	4.3
1914	4.26
1915	4.22
1916	4.2
1917	4.19
1918	4.17
1919	4.16
1920	4.14
1921	4.08
1922	4.02
1923	4.02
1924	3.92
1925	3.82
1926	3.87
1927	3.7
1928	3.8
1929	3.69
1930	3.68
1931	3.58
1932	3.64
1933	3.59
1934	3.38
1935	3.31
1936	3.18
1937	2.89
1938	2.56
1939	2.12
1940	3.09
1941	2.47
1942	2.53
1943	2.88
1944	2.84
1945	2.91
1946	2.7
1947	2.67
1948	2.88
1949	2.68
1950	2.45
1951	2.47
1952	2.51
1953	2.55
1954	2.59
1955	2.62
1956	2.66
1957	2.69
1958	2.72
1959	2.74
1960	2.77
1961	2.79
1962	2.8
1963	2.82
1964	2.83
1965	2.83
1966	2.84
1967	2.85
1968	2.86
1969	2.87
1970	2.87
1971	2.87
1972	2.86
1973	2.84
1974	2.8
1975	2.75
1976	2.68
1977	2.59
1978	2.48
1979	2.36
1980	2.22
1981	2.09
1982	1.96
1983	1.84
1984	1.73
1985	1.63
1986	1.55
1987	1.49
1988	1.43
1989	1.38
1990	1.34
1991	1.31
1992	1.28
1993	1.25
1994	1.23
1995	1.21
1996	1.2
1997	1.2
1998	1.2
1999	1.21
2000	1.23
2001	1.25
2002	1.28
2003	1.3
2004	1.33
2005	1.35
2006	1.37
2007	1.38
2008	1.38
2009	1.38
2010	1.37
2011	1.35
2012	1.35
2013	1.34
2014	1.34
2015	1.35
2016	1.36
2017	1.38
2018	1.39