Year	Total
1800	4.78
1801	4.78
1802	4.77
1803	4.77
1804	4.77
1805	4.77
1806	4.76
1807	4.76
1808	4.76
1809	4.76
1810	4.75
1811	4.75
1812	4.75
1813	4.75
1814	4.74
1815	4.74
1816	4.74
1817	4.73
1818	4.73
1819	4.73
1820	4.73
1821	4.72
1822	4.72
1823	4.72
1824	4.72
1825	4.71
1826	4.71
1827	4.71
1828	4.71
1829	4.7
1830	4.7
1831	4.69
1832	4.69
1833	4.68
1834	4.67
1835	4.67
1836	4.66
1837	4.65
1838	4.65
1839	4.64
1840	4.64
1841	4.63
1842	4.62
1843	4.62
1844	4.61
1845	4.6
1846	4.6
1847	4.59
1848	4.58
1849	4.58
1850	4.57
1851	4.7
1852	4.34
1853	4.24
1854	4.37
1855	4.11
1856	4.33
1857	4.33
1858	4.49
1859	4.76
1860	4.53
1861	4.46
1862	4.35
1863	4.56
1864	4.43
1865	4.36
1866	4.25
1867	4.32
1868	4.25
1869	4.33
1870	4.43
1871	4.25
1872	4.27
1873	4.36
1874	4.45
1875	4.16
1876	4.62
1877	4.48
1878	4.33
1879	4.45
1880	4.26
1881	4.29
1882	4.18
1883	4.02
1884	4.32
1885	4.01
1886	4.12
1887	3.99
1888	3.89
1889	3.89
1890	3.78
1891	3.94
1892	3.76
1893	3.91
1894	3.82
1895	3.86
1896	3.84
1897	3.97
1898	3.89
1899	4.07
1900	4.04
1901	4.22
1902	4.18
1903	4.14
1904	4.1
1905	4.06
1906	4.03
1907	4
1908	3.98
1909	3.95
1910	3.92
1911	3.75
1912	3.57
1913	3.4
1914	3.22
1915	3.05
1916	3.01
1917	2.96
1918	2.92
1919	2.87
1920	2.83
1921	2.78
1922	2.73
1923	2.67
1924	2.62
1925	2.57
1926	2.6
1927	2.63
1928	2.65
1929	2.68
1930	2.71
1931	2.54
1932	2.37
1933	2.19
1934	2.02
1935	1.85
1936	1.82
1937	1.8
1938	1.77
1939	1.75
1940	1.72
1941	1.73
1942	1.74
1943	1.74
1944	1.75
1945	1.76
1946	2.33
1947	2.89
1948	2.55
1949	2.21
1950	1.87
1951	1.9
1952	1.95
1953	2.01
1954	2.06
1955	2.12
1956	2.17
1957	2.22
1958	2.27
1959	2.31
1960	2.35
1961	2.38
1962	2.39
1963	2.39
1964	2.37
1965	2.34
1966	2.29
1967	2.22
1968	2.14
1969	2.05
1970	1.96
1971	1.87
1972	1.78
1973	1.7
1974	1.63
1975	1.57
1976	1.53
1977	1.5
1978	1.48
1979	1.46
1980	1.46
1981	1.45
1982	1.45
1983	1.45
1984	1.45
1985	1.45
1986	1.46
1987	1.47
1988	1.5
1989	1.53
1990	1.56
1991	1.6
1992	1.64
1993	1.67
1994	1.69
1995	1.71
1996	1.72
1997	1.72
1998	1.72
1999	1.71
2000	1.7
2001	1.68
2002	1.67
2003	1.66
2004	1.65
2005	1.64
2006	1.63
2007	1.62
2008	1.61
2009	1.59
2010	1.58
2011	1.57
2012	1.56
2013	1.55
2014	1.56
2015	1.56
2016	1.57
2017	1.58
2018	1.59