Year	Total
1800	5.22
1801	5.22
1802	5.22
1803	5.22
1804	5.22
1805	5.22
1806	5.22
1807	5.22
1808	5.22
1809	5.22
1810	5.22
1811	5.22
1812	5.22
1813	5.22
1814	5.22
1815	5.22
1816	5.22
1817	5.22
1818	5.22
1819	5.22
1820	5.22
1821	5.22
1822	5.22
1823	5.22
1824	5.22
1825	5.22
1826	5.22
1827	5.22
1828	5.22
1829	5.22
1830	5.22
1831	5.22
1832	5.22
1833	5.22
1834	5.22
1835	5.22
1836	5.22
1837	5.22
1838	5.22
1839	5.22
1840	5.22
1841	5.22
1842	5.22
1843	5.22
1844	5.22
1845	5.22
1846	5.22
1847	5.22
1848	5.22
1849	5.22
1850	5.22
1851	5.08
1852	4.94
1853	4.8
1854	4.66
1855	4.52
1856	4.38
1857	4.24
1858	4.11
1859	3.97
1860	4.23
1861	4.29
1862	4.29
1863	4.07
1864	4.82
1865	4.64
1866	4.19
1867	4.25
1868	4.48
1869	4.56
1870	4.61
1871	4.49
1872	4.29
1873	4.36
1874	4.6
1875	5.2
1876	4.96
1877	4.74
1878	4.22
1879	4.97
1880	5.05
1881	5.56
1882	5.41
1883	5.74
1884	5.55
1885	5.78
1886	5.65
1887	5.49
1888	5.68
1889	5.44
1890	5.16
1891	5.67
1892	5.23
1893	5.43
1894	5.48
1895	5.67
1896	5.45
1897	5.75
1898	4.92
1899	5.63
1900	5.2
1901	5.27
1902	5.23
1903	5.37
1904	5.37
1905	5.13
1906	5.35
1907	5.51
1908	5.4
1909	5.51
1910	5.27
1911	5.67
1912	5.82
1913	5.64
1914	5.64
1915	5.43
1916	4.84
1917	4.25
1918	3.67
1919	3.08
1920	4.52
1921	5.12
1922	4.98
1923	4.88
1924	4.92
1925	4.72
1926	4.66
1927	4.57
1928	4.65
1929	4.57
1930	4.69
1931	4.46
1932	4.81
1933	4.3
1934	4.34
1935	4.11
1936	4.22
1937	4.13
1938	3.97
1939	3.79
1940	3.55
1941	3.08
1942	2.87
1943	3.14
1944	2.91
1945	2.63
1946	3.32
1947	3.14
1948	3.2
1949	3.7
1950	3.58
1951	3.43
1952	3.31
1953	3.19
1954	3.08
1955	2.98
1956	2.86
1957	2.73
1958	2.59
1959	2.45
1960	2.34
1961	2.25
1962	2.22
1963	2.25
1964	2.33
1965	2.46
1966	2.59
1967	2.71
1968	2.79
1969	2.83
1970	2.82
1971	2.79
1972	2.73
1973	2.69
1974	2.64
1975	2.61
1976	2.58
1977	2.54
1978	2.5
1979	2.45
1980	2.4
1981	2.36
1982	2.32
1983	2.3
1984	2.29
1985	2.27
1986	2.25
1987	2.19
1988	2.11
1989	2
1990	1.87
1991	1.74
1992	1.61
1993	1.51
1994	1.43
1995	1.37
1996	1.34
1997	1.32
1998	1.31
1999	1.31
2000	1.31
2001	1.31
2002	1.32
2003	1.33
2004	1.36
2005	1.38
2006	1.4
2007	1.43
2008	1.45
2009	1.46
2010	1.47
2011	1.48
2012	1.49
2013	1.49
2014	1.5
2015	1.51
2016	1.52
2017	1.53
2018	1.54