Year	Total
1800	4.85
1801	4.85
1802	4.84
1803	4.84
1804	4.83
1805	4.83
1806	4.82
1807	4.82
1808	4.82
1809	4.81
1810	4.81
1811	4.8
1812	4.8
1813	4.79
1814	4.79
1815	4.78
1816	4.78
1817	4.78
1818	4.77
1819	4.77
1820	4.76
1821	4.76
1822	4.75
1823	4.75
1824	4.75
1825	4.74
1826	4.74
1827	4.73
1828	4.73
1829	4.72
1830	4.72
1831	4.77
1832	4.82
1833	4.87
1834	4.92
1835	4.97
1836	4.97
1837	4.98
1838	4.98
1839	4.99
1840	5
1841	4.94
1842	4.88
1843	4.82
1844	4.76
1845	4.7
1846	4.64
1847	4.58
1848	4.51
1849	4.45
1850	4.38
1851	4.32
1852	4.25
1853	4.18
1854	4.25
1855	4.31
1856	4.38
1857	4.44
1858	4.51
1859	4.53
1860	4.56
1861	4.58
1862	4.61
1863	4.63
1864	4.66
1865	4.68
1866	4.71
1867	4.73
1868	4.76
1869	4.78
1870	4.8
1871	4.83
1872	4.85
1873	4.87
1874	4.85
1875	4.83
1876	4.82
1877	4.8
1878	4.78
1879	4.75
1880	4.71
1881	4.68
1882	4.64
1883	4.61
1884	4.55
1885	4.49
1886	4.42
1887	4.36
1888	4.3
1889	4.27
1890	4.25
1891	4.22
1892	4.2
1893	4.17
1894	4.13
1895	4.09
1896	4.06
1897	4.02
1898	3.98
1899	3.91
1900	3.84
1901	3.79
1902	3.73
1903	3.68
1904	3.63
1905	3.57
1906	3.52
1907	3.47
1908	3.42
1909	3.36
1910	3.31
1911	3.26
1912	3.2
1913	3.15
1914	3.1
1915	3.04
1916	2.99
1917	2.94
1918	2.89
1919	2.83
1920	2.78
1921	2.73
1922	2.67
1923	2.62
1924	2.57
1925	2.51
1926	2.46
1927	2.41
1928	2.36
1929	2.3
1930	2.25
1931	2.22
1932	2.19
1933	2.08
1934	2.04
1935	1.94
1936	1.95
1937	1.99
1938	2.11
1939	2.1
1940	1.84
1941	1.66
1942	1.81
1943	2.07
1944	2.13
1945	2.18
1946	2.54
1947	2.48
1948	2.46
1949	2.41
1950	2.31
1951	2.32
1952	2.34
1953	2.36
1954	2.39
1955	2.42
1956	2.46
1957	2.49
1958	2.53
1959	2.57
1960	2.6
1961	2.62
1962	2.63
1963	2.62
1964	2.6
1965	2.56
1966	2.5
1967	2.43
1968	2.36
1969	2.28
1970	2.21
1971	2.13
1972	2.05
1973	1.98
1974	1.91
1975	1.84
1976	1.78
1977	1.73
1978	1.69
1979	1.66
1980	1.63
1981	1.61
1982	1.59
1983	1.58
1984	1.57
1985	1.57
1986	1.56
1987	1.56
1988	1.57
1989	1.57
1990	1.58
1991	1.59
1992	1.6
1993	1.6
1994	1.61
1995	1.61
1996	1.61
1997	1.61
1998	1.61
1999	1.62
2000	1.63
2001	1.65
2002	1.68
2003	1.7
2004	1.73
2005	1.76
2006	1.78
2007	1.8
2008	1.81
2009	1.81
2010	1.81
2011	1.8
2012	1.8
2013	1.79
2014	1.79
2015	1.79
2016	1.79
2017	1.79
2018	1.8