Year	Total
1800	5.98
1801	5.98
1802	5.98
1803	5.98
1804	5.98
1805	5.98
1806	5.98
1807	5.98
1808	5.98
1809	5.98
1810	5.98
1811	5.98
1812	5.98
1813	5.98
1814	5.98
1815	5.98
1816	5.98
1817	5.98
1818	5.98
1819	5.98
1820	5.98
1821	5.98
1822	5.98
1823	5.98
1824	5.98
1825	5.98
1826	5.98
1827	5.98
1828	5.98
1829	5.98
1830	5.98
1831	5.98
1832	5.98
1833	5.98
1834	5.98
1835	5.98
1836	5.98
1837	5.98
1838	5.98
1839	5.98
1840	5.98
1841	6
1842	6.02
1843	6.05
1844	6.07
1845	6.09
1846	6.11
1847	6.13
1848	6.16
1849	6.18
1850	6.2
1851	6.22
1852	6.24
1853	5.99
1854	5.8
1855	5.99
1856	6.1
1857	6
1858	5.57
1859	5.57
1860	6.38
1861	5.31
1862	5.47
1863	5.47
1864	5.67
1865	4.82
1866	5.15
1867	5.29
1868	5.53
1869	5.64
1870	5.67
1871	5.56
1872	5.91
1873	6.02
1874	5.99
1875	5.71
1876	5.44
1877	5.21
1878	4.89
1879	5.44
1880	5.12
1881	6.19
1882	5.61
1883	5.72
1884	5.4
1885	3.46
1886	4.29
1887	4.42
1888	4.74
1889	5.19
1890	5.04
1891	4.6
1892	5.13
1893	5.05
1894	5.29
1895	4.85
1896	4.64
1897	4.66
1898	4.44
1899	4.49
1900	5.11
1901	5.72
1902	6.34
1903	6.3
1904	6.25
1905	6.21
1906	6.17
1907	6.12
1908	6.13
1909	6.14
1910	6.15
1911	6.16
1912	6.16
1913	6.08
1914	6
1915	5.92
1916	5.84
1917	5.76
1918	5.75
1919	5.73
1920	5.71
1921	5.7
1922	5.68
1923	5.67
1924	5.65
1925	5.64
1926	5.63
1927	5.61
1928	5.58
1929	5.54
1930	5.5
1931	5.47
1932	5.43
1933	5.33
1934	5.23
1935	5.13
1936	5.03
1937	4.93
1938	4.93
1939	4.94
1940	4.94
1941	4.95
1942	4.96
1943	4.95
1944	4.95
1945	4.94
1946	4.94
1947	4.94
1948	4.9
1949	4.86
1950	4.82
1951	4.9
1952	5.02
1953	5.11
1954	5.18
1955	5.23
1956	5.25
1957	5.24
1958	5.22
1959	5.17
1960	5.1
1961	5.05
1962	5
1963	4.93
1964	4.84
1965	4.75
1966	4.63
1967	4.5
1968	4.35
1969	4.19
1970	4.02
1971	3.84
1972	3.67
1973	3.51
1974	3.35
1975	3.22
1976	3.1
1977	2.99
1978	2.91
1979	2.83
1980	2.78
1981	2.74
1982	2.71
1983	2.69
1984	2.68
1985	2.67
1986	2.65
1987	2.64
1988	2.61
1989	2.58
1990	2.55
1991	2.5
1992	2.46
1993	2.41
1994	2.36
1995	2.31
1996	2.27
1997	2.23
1998	2.18
1999	2.14
2000	2.11
2001	2.07
2002	2.05
2003	2.02
2004	2
2005	1.98
2006	1.96
2007	1.95
2008	1.93
2009	1.9
2010	1.88
2011	1.86
2012	1.83
2013	1.82
2014	1.8
2015	1.79
2016	1.77
2017	1.77
2018	1.76