Year	Years
1800	36
1801	36
1802	36
1803	36
1804	36
1805	36
1806	36
1807	36
1808	36
1809	36
1810	36
1811	36
1812	36
1813	36
1814	36
1815	36
1816	36
1817	36
1818	36
1819	36
1820	36
1821	36
1822	36
1823	36
1824	36
1825	36
1826	36
1827	36
1828	36
1829	36
1830	36
1831	36
1832	36
1833	36
1834	36
1835	36
1836	36
1837	36
1838	36
1839	36
1840	36
1841	36
1842	36
1843	36
1844	36
1845	36
1846	36
1847	36
1848	36
1849	36
1850	36
1851	36
1852	36
1853	36
1854	36
1855	36
1856	36
1857	36
1858	36
1859	36
1860	36
1861	36
1862	36
1863	36
1864	36
1865	36
1866	36
1867	36
1868	36
1869	36
1870	36
1871	36
1872	36
1873	36
1874	36
1875	36
1876	36
1877	36
1878	36
1879	36
1880	36
1881	35.99
1882	35.99
1883	35.99
1884	35.99
1885	35.99
1886	35.99
1887	35.99
1888	35.99
1889	35.99
1890	35.99
1891	36.12
1892	36.26
1893	36.39
1894	36.52
1895	36.66
1896	36.79
1897	36.93
1898	37.06
1899	37.19
1900	37.33
1901	37.57
1902	37.8
1903	38.04
1904	38.28
1905	38.53
1906	38.77
1907	39.01
1908	39.25
1909	39.5
1910	39.74
1911	39.97
1912	40.2
1913	40.43
1914	40.66
1915	40.89
1916	41.12
1917	41.34
1918	30.09
1919	41.8
1920	42.03
1921	42.84
1922	43.66
1923	44.47
1924	45.29
1925	46.1
1926	46.92
1927	47.73
1928	48.54
1929	49.36
1930	50.17
1931	50.85
1932	51.53
1933	52.21
1934	52.89
1935	53.57
1936	54.24
1937	54.91
1938	55.59
1939	56.27
1940	56.95
1941	56.51
1942	50.95
1943	40.96
1944	25.98
1945	46.95
1946	54.95
1947	58.94
1948	60.64
1949	61.23
1950	62.01
1951	62.39
1952	63.96
1953	63.8
1954	65.36
1955	66.81
1956	65.97
1957	66.34
1958	67.34
1959	67.24
1960	68.01
1961	68.94
1962	67.88
1963	68.9
1964	69.4
1965	69.09
1966	69.84
1967	69.41
1968	69.24
1969	69.31
1970	69.15
1971	69.27
1972	69.47
1973	69.5
1974	69.33
1975	69.41
1976	69.63
1977	69.75
1978	69.64
1979	69.49
1980	69.31
1981	69.25
1982	69.16
1983	69.14
1984	69.12
1985	69.14
1986	69.31
1987	69.53
1988	69.68
1989	69.65
1990	69.57
1991	69.38
1992	69.41
1993	69.53
1994	69.81
1995	70.16
1996	70.46
1997	70.82
1998	71.14
1999	71.46
2000	71.8
2001	72.2
2002	72.5
2003	72.69
2004	72.9
2005	73.09
2006	73.33
2007	73.58
2008	73.87
2009	74.19
2010	74.52
2011	74.89
2012	75.2
2013	75.46
2014	75.59
2015	75.65
2016	75.66
2017	75.78
2018	75.9