Year	Total
1800	6.45
1801	6.45
1802	6.45
1803	6.45
1804	6.45
1805	6.45
1806	6.45
1807	6.45
1808	6.45
1809	6.45
1810	6.45
1811	6.45
1812	6.45
1813	6.45
1814	6.45
1815	6.45
1816	6.45
1817	6.45
1818	6.45
1819	6.45
1820	6.45
1821	6.45
1822	6.45
1823	6.45
1824	6.45
1825	6.45
1826	6.45
1827	6.45
1828	6.45
1829	6.45
1830	6.45
1831	6.45
1832	6.45
1833	6.45
1834	6.45
1835	6.45
1836	6.45
1837	6.45
1838	6.45
1839	6.45
1840	6.45
1841	6.45
1842	6.45
1843	6.45
1844	6.45
1845	6.45
1846	6.45
1847	6.45
1848	6.45
1849	6.45
1850	6.45
1851	6.45
1852	6.45
1853	6.45
1854	6.45
1855	6.45
1856	6.45
1857	6.45
1858	6.45
1859	6.45
1860	6.45
1861	6.45
1862	6.45
1863	6.45
1864	6.45
1865	6.45
1866	6.45
1867	6.45
1868	6.45
1869	6.45
1870	6.45
1871	6.45
1872	6.45
1873	6.45
1874	6.45
1875	6.45
1876	6.45
1877	6.45
1878	6.45
1879	6.45
1880	6.45
1881	6.45
1882	6.45
1883	6.45
1884	6.45
1885	6.45
1886	6.45
1887	6.45
1888	6.45
1889	6.45
1890	6.45
1891	6.45
1892	6.45
1893	6.45
1894	6.45
1895	6.45
1896	6.45
1897	6.45
1898	6.45
1899	6.45
1900	6.45
1901	6.39
1902	6.34
1903	6.28
1904	6.23
1905	6.17
1906	6.12
1907	6.06
1908	6.14
1909	6.23
1910	6.31
1911	6.39
1912	6.48
1913	6.38
1914	6.29
1915	6.19
1916	6.1
1917	6
1918	6.15
1919	6.29
1920	6.43
1921	6.57
1922	6.71
1923	6.74
1924	6.76
1925	6.79
1926	6.81
1927	6.84
1928	6.76
1929	6.67
1930	6.59
1931	6.51
1932	6.42
1933	6.37
1934	6.31
1935	6.25
1936	6.2
1937	6.14
1938	6.17
1939	6.19
1940	6.22
1941	6.24
1942	6.27
1943	6.37
1944	6.48
1945	6.59
1946	6.69
1947	6.8
1948	6.93
1949	7.07
1950	7.2
1951	7.16
1952	7.09
1953	7.04
1954	7
1955	6.97
1956	6.95
1957	6.94
1958	6.92
1959	6.91
1960	6.9
1961	6.86
1962	6.82
1963	6.79
1964	6.77
1965	6.74
1966	6.72
1967	6.71
1968	6.69
1969	6.66
1970	6.64
1971	6.62
1972	6.6
1973	6.58
1974	6.56
1975	6.54
1976	6.51
1977	6.48
1978	6.44
1979	6.4
1980	6.34
1981	6.27
1982	6.19
1983	6.09
1984	5.98
1985	5.87
1986	5.76
1987	5.66
1988	5.57
1989	5.5
1990	5.44
1991	5.38
1992	5.32
1993	5.25
1994	5.17
1995	5.09
1996	4.99
1997	4.9
1998	4.8
1999	4.7
2000	4.6
2001	4.49
2002	4.37
2003	4.25
2004	4.11
2005	3.97
2006	3.83
2007	3.7
2008	3.58
2009	3.47
2010	3.38
2011	3.29
2012	3.22
2013	3.15
2014	3.09
2015	3.03
2016	2.97
2017	2.92
2018	2.87