Year	Years
1800	38.37
1801	38.37
1802	38.37
1803	38.37
1804	38.37
1805	38.37
1806	38.37
1807	38.37
1808	38.37
1809	38.37
1810	38.37
1811	38.37
1812	38.37
1813	38.37
1814	38.37
1815	38.37
1816	38.37
1817	38.37
1818	38.37
1819	38.37
1820	38.37
1821	38.37
1822	38.37
1823	38.37
1824	38.37
1825	38.37
1826	38.37
1827	38.37
1828	38.37
1829	38.37
1830	38.37
1831	38.37
1832	38.37
1833	38.37
1834	38.37
1835	38.37
1836	38.37
1837	38.37
1838	38.37
1839	38.37
1840	38.37
1841	38.37
1842	38.37
1843	38.37
1844	38.37
1845	38.37
1846	38.37
1847	38.37
1848	38.37
1849	38.37
1850	38.37
1851	38.37
1852	38.37
1853	38.37
1854	38.37
1855	38.37
1856	38.37
1857	38.37
1858	38.37
1859	38.37
1860	38.37
1861	38.37
1862	38.37
1863	38.37
1864	38.37
1865	38.37
1866	38.37
1867	38.37
1868	38.37
1869	38.37
1870	38.37
1871	38.37
1872	38.37
1873	38.37
1874	38.37
1875	38.37
1876	38.48
1877	38.58
1878	38.69
1879	38.8
1880	38.9
1881	39
1882	39.11
1883	39.22
1884	39.32
1885	39.43
1886	39.72
1887	40.02
1888	40.31
1889	40.61
1890	40.9
1891	41.19
1892	41.49
1893	41.78
1894	42.08
1895	42.37
1896	42.68
1897	42.97
1898	43.28
1899	43.59
1900	43.9
1901	44.2
1902	44.51
1903	44.82
1904	45.12
1905	45.43
1906	46.02
1907	46.61
1908	47.21
1909	47.8
1910	48.38
1911	48.97
1912	49.56
1913	50.15
1914	46.15
1915	40.51
1916	38.97
1917	40.06
1918	32.92
1919	48.29
1920	53.47
1921	54.97
1922	55.58
1923	56.18
1924	56.78
1925	57.38
1926	57.79
1927	58.2
1928	58.6
1929	59
1930	59.41
1931	59.82
1932	60.23
1933	60.63
1934	61.04
1935	61.45
1936	61.74
1937	62.02
1938	62.3
1939	60.95
1940	60.6
1941	58.95
1942	54.95
1943	49.65
1944	36.96
1945	28.97
1946	60.45
1947	62.05
1948	63.65
1949	65.24
1950	66.83
1951	67
1952	67.32
1953	67.62
1954	67.92
1955	68.19
1956	68.48
1957	68.4
1958	69.14
1959	69.25
1960	69.17
1961	69.76
1962	69.92
1963	70.01
1964	70.56
1965	70.54
1966	70.66
1967	70.88
1968	70.53
1969	70.37
1970	70.61
1971	70.68
1972	70.9
1973	71.12
1974	71.34
1975	71.52
1976	71.9
1977	72.29
1978	72.48
1979	72.76
1980	72.96
1981	73.19
1982	73.44
1983	73.71
1984	74.02
1985	74.23
1986	74.45
1987	74.72
1988	74.94
1989	75.15
1990	75.28
1991	75.53
1992	75.83
1993	76.01
1994	76.24
1995	76.49
1996	76.74
1997	77.03
1998	77.31
1999	77.59
2000	77.89
2001	78.17
2002	78.4
2003	78.61
2004	78.91
2005	79.15
2006	79.4
2007	79.59
2008	79.76
2009	79.91
2010	80.09
2011	80.27
2012	80.43
2013	80.54
2014	80.76
2015	80.84
2016	80.91
2017	81.08
2018	81.25