Year	Total
1800	4.14
1801	4.14
1802	4.14
1803	4.14
1804	4.14
1805	4.14
1806	4.14
1807	4.14
1808	4.14
1809	4.14
1810	4.14
1811	4.14
1812	4.14
1813	4.14
1814	4.14
1815	4.14
1816	4.14
1817	4.14
1818	4.14
1819	4.14
1820	4.14
1821	4.14
1822	4.14
1823	4.14
1824	4.14
1825	4.14
1826	4.14
1827	4.14
1828	4.14
1829	4.14
1830	4.14
1831	4.14
1832	4.14
1833	4.14
1834	4.14
1835	4.14
1836	4.14
1837	4.14
1838	4.14
1839	4.14
1840	4.14
1841	4.14
1842	4.14
1843	4.14
1844	4.14
1845	4.14
1846	4.14
1847	4.14
1848	4.14
1849	4.14
1850	4.14
1851	4.02
1852	3.89
1853	3.74
1854	3.65
1855	3.44
1856	3.82
1857	3.85
1858	4.05
1859	4.27
1860	4.19
1861	4.14
1862	4.18
1863	4.32
1864	4.32
1865	4.26
1866	4.33
1867	4.16
1868	4.04
1869	4.14
1870	3.99
1871	3.99
1872	3.99
1873	3.98
1874	4.07
1875	4.26
1876	4.4
1877	4.29
1878	4.19
1879	4.09
1880	3.97
1881	3.99
1882	3.87
1883	3.82
1884	3.79
1885	3.71
1886	3.73
1887	3.74
1888	3.71
1889	3.7
1890	3.56
1891	3.78
1892	3.71
1893	3.74
1894	3.66
1895	3.66
1896	3.77
1897	3.79
1898	3.82
1899	3.89
1900	3.83
1901	3.89
1902	3.82
1903	3.67
1904	3.66
1905	3.6
1906	3.6
1907	3.51
1908	3.54
1909	3.42
1910	3.1
1911	3.07
1912	3.04
1913	3.01
1914	3
1915	2.61
1916	2.53
1917	2.48
1918	2.47
1919	2.49
1920	2.34
1921	2.37
1922	2.4
1923	2.43
1924	2.36
1925	2.3
1926	2.23
1927	2.17
1928	2.1
1929	2.05
1930	1.99
1931	1.97
1932	1.94
1933	1.89
1934	1.88
1935	1.84
1936	1.8
1937	1.74
1938	1.78
1939	1.79
1940	1.82
1941	2.05
1942	2.27
1943	2.4
1944	2.5
1945	2.6
1946	2.62
1947	2.56
1948	2.54
1949	2.44
1950	2.33
1951	2.32
1952	2.3
1953	2.3
1954	2.31
1955	2.33
1956	2.36
1957	2.39
1958	2.43
1959	2.48
1960	2.52
1961	2.55
1962	2.58
1963	2.58
1964	2.56
1965	2.53
1966	2.47
1967	2.4
1968	2.31
1969	2.22
1970	2.12
1971	2.02
1972	1.92
1973	1.83
1974	1.74
1975	1.67
1976	1.61
1977	1.57
1978	1.54
1979	1.52
1980	1.51
1981	1.51
1982	1.52
1983	1.53
1984	1.54
1985	1.54
1986	1.54
1987	1.55
1988	1.55
1989	1.55
1990	1.55
1991	1.54
1992	1.54
1993	1.53
1994	1.53
1995	1.52
1996	1.5
1997	1.49
1998	1.47
1999	1.45
2000	1.44
2001	1.43
2002	1.42
2003	1.42
2004	1.42
2005	1.43
2006	1.44
2007	1.46
2008	1.47
2009	1.49
2010	1.5
2011	1.51
2012	1.52
2013	1.53
2014	1.54
2015	1.54
2016	1.55
2017	1.55
2018	1.55