Year	Years
1800	35.4
1801	35.4
1802	35.4
1803	35.4
1804	35.4
1805	35.4
1806	35.4
1807	35.4
1808	35.4
1809	35.4
1810	35.4
1811	35.4
1812	35.4
1813	35.4
1814	35.4
1815	35.4
1816	35.4
1817	35.4
1818	35.4
1819	35.4
1820	35.4
1821	35.4
1822	35.4
1823	35.4
1824	35.4
1825	35.4
1826	35.4
1827	35.4
1828	35.4
1829	35.4
1830	35.4
1831	35.4
1832	35.4
1833	35.4
1834	35.4
1835	35.4
1836	35.4
1837	35.4
1838	35.4
1839	35.4
1840	35.4
1841	35.4
1842	35.4
1843	35.4
1844	35.4
1845	35.4
1846	35.4
1847	35.4
1848	35.4
1849	35.4
1850	35.4
1851	35.4
1852	35.4
1853	35.4
1854	35.4
1855	35.4
1856	35.4
1857	35.4
1858	35.4
1859	35.4
1860	35.4
1861	35.4
1862	35.4
1863	35.4
1864	35.4
1865	35.4
1866	35.4
1867	35.4
1868	35.4
1869	35.4
1870	35.4
1871	35.4
1872	35.4
1873	35.41
1874	35.41
1875	35.41
1876	35.41
1877	35.42
1878	35.42
1879	35.42
1880	35.42
1881	35.43
1882	35.43
1883	35.43
1884	35.43
1885	35.43
1886	35.44
1887	35.44
1888	35.44
1889	35.44
1890	35.45
1891	35.45
1892	35.45
1893	35.45
1894	35.46
1895	35.46
1896	35.46
1897	35.46
1898	35.47
1899	35.47
1900	35.47
1901	35.47
1902	35.47
1903	35.48
1904	35.48
1905	35.48
1906	35.48
1907	35.49
1908	35.49
1909	35.49
1910	35.49
1911	35.5
1912	35.5
1913	35.5
1914	35.5
1915	35.5
1916	35.51
1917	35.51
1918	19.49
1919	35.51
1920	35.52
1921	35.52
1922	35.52
1923	35.52
1924	35.53
1925	35.53
1926	35.53
1927	35.53
1928	35.53
1929	35.54
1930	36.43
1931	37.34
1932	38.24
1933	39.14
1934	40.04
1935	40.94
1936	41.84
1937	42.75
1938	43.64
1939	43.19
1940	42.19
1941	41.69
1942	40.19
1943	37.18
1944	34.17
1945	47.23
1946	50.25
1947	51.77
1948	52.67
1949	53.58
1950	54.47
1951	54.69
1952	55.18
1953	55.77
1954	56.49
1955	57.33
1956	58.28
1957	59.32
1958	60.42
1959	61.56
1960	62.66
1961	63.69
1962	64.59
1963	65.33
1964	65.88
1965	66.27
1966	66.54
1967	66.74
1968	66.93
1969	67.13
1970	67.39
1971	68.01
1972	68.63
1973	69.24
1974	69.81
1975	70.35
1976	70.85
1977	71.32
1978	71.73
1979	72
1980	72.25
1981	72.4
1982	72.5
1983	72.61
1984	72.8
1985	72.98
1986	73.16
1987	73.18
1988	73.39
1989	73.65
1990	73.9
1991	73.88
1992	73.92
1993	73.94
1994	73.99
1995	74.14
1996	74.31
1997	72.47
1998	74.33
1999	74.39
2000	74.43
2001	74.48
2002	74.52
2003	74.59
2004	74.72
2005	74.91
2006	75.16
2007	75.4
2008	75.58
2009	75.88
2010	76.31
2011	76.69
2012	76.97
2013	77.2
2014	77.39
2015	77.56
2016	77.71
2017	77.86
2018	78.01