Year	Total
1800	5.18
1801	5.18
1802	5.18
1803	5.18
1804	5.18
1805	5.18
1806	5.18
1807	5.18
1808	5.18
1809	5.18
1810	5.18
1811	5.18
1812	5.18
1813	5.18
1814	5.18
1815	5.18
1816	5.18
1817	5.18
1818	5.18
1819	5.18
1820	5.18
1821	5.18
1822	5.18
1823	5.18
1824	5.18
1825	5.18
1826	5.18
1827	5.18
1828	5.18
1829	5.18
1830	5.18
1831	5.18
1832	5.18
1833	5.18
1834	5.18
1835	5.18
1836	5.18
1837	5.18
1838	5.18
1839	5.18
1840	5.18
1841	5.18
1842	5.18
1843	5.18
1844	5.18
1845	5.18
1846	5.18
1847	5.18
1848	5.18
1849	5.18
1850	5.18
1851	5.15
1852	5.12
1853	5.09
1854	5.06
1855	5.03
1856	5
1857	4.97
1858	4.94
1859	4.91
1860	4.88
1861	4.85
1862	5.11
1863	5.41
1864	5.03
1865	5.11
1866	5.02
1867	4.64
1868	5.09
1869	5.12
1870	5.14
1871	5.23
1872	4.96
1873	5.18
1874	5.23
1875	5.55
1876	5.61
1877	5.29
1878	5.23
1879	5.58
1880	5.23
1881	5.28
1882	5.4
1883	5.5
1884	5.59
1885	5.48
1886	5.57
1887	5.41
1888	5.36
1889	5.35
1890	4.93
1891	5.2
1892	4.96
1893	5.25
1894	5.08
1895	5.11
1896	4.97
1897	4.95
1898	4.62
1899	4.79
1900	5.28
1901	5.22
1902	5.16
1903	5.1
1904	5.04
1905	4.98
1906	4.91
1907	4.85
1908	4.79
1909	4.73
1910	4.67
1911	4.59
1912	4.5
1913	4.42
1914	4.34
1915	4.26
1916	4.17
1917	4.09
1918	4.01
1919	3.93
1920	3.84
1921	3.81
1922	3.6
1923	3.39
1924	3.18
1925	3.36
1926	3.24
1927	3.05
1928	3.08
1929	2.92
1930	2.84
1931	2.84
1932	2.78
1933	2.72
1934	2.57
1935	2.55
1936	2.48
1937	2.42
1938	2.46
1939	2.5
1940	2.48
1941	2.51
1942	2.54
1943	2.57
1944	2.6
1945	2.63
1946	2.66
1947	2.69
1948	2.72
1949	2.75
1950	2.78
1951	2.76
1952	2.72
1953	2.67
1954	2.61
1955	2.53
1956	2.44
1957	2.34
1958	2.23
1959	2.12
1960	2.02
1961	1.94
1962	1.88
1963	1.84
1964	1.83
1965	1.85
1966	1.88
1967	1.92
1968	1.95
1969	1.98
1970	2.01
1971	2.03
1972	2.06
1973	2.1
1974	2.15
1975	2.18
1976	2.21
1977	2.2
1978	2.17
1979	2.12
1980	2.04
1981	1.96
1982	1.89
1983	1.84
1984	1.8
1985	1.79
1986	1.79
1987	1.81
1988	1.81
1989	1.82
1990	1.81
1991	1.78
1992	1.74
1993	1.69
1994	1.63
1995	1.56
1996	1.49
1997	1.43
1998	1.37
1999	1.33
2000	1.31
2001	1.29
2002	1.29
2003	1.29
2004	1.3
2005	1.3
2006	1.31
2007	1.32
2008	1.32
2009	1.33
2010	1.33
2011	1.33
2012	1.33
2013	1.34
2014	1.35
2015	1.36
2016	1.37
2017	1.39
2018	1.4