Year	Years
1800	32.3
1801	32.3
1802	32.3
1803	32.3
1804	32.3
1805	32.3
1806	32.3
1807	32.3
1808	32.3
1809	32.3
1810	32.3
1811	32.3
1812	32.3
1813	32.3
1814	32.3
1815	32.3
1816	32.3
1817	32.3
1818	32.3
1819	32.3
1820	32.3
1821	32.3
1822	32.3
1823	32.3
1824	32.3
1825	32.3
1826	32.3
1827	32.3
1828	32.3
1829	32.3
1830	32.3
1831	32.3
1832	32.3
1833	32.3
1834	32.3
1835	32.3
1836	32.3
1837	32.3
1838	32.3
1839	32.3
1840	32.3
1841	32.3
1842	32.3
1843	32.3
1844	32.3
1845	32.3
1846	32.3
1847	32.3
1848	32.3
1849	32.3
1850	32.3
1851	32.3
1852	32.3
1853	32.3
1854	32.3
1855	32.3
1856	32.3
1857	32.3
1858	32.3
1859	32.3
1860	32.3
1861	32.3
1862	32.3
1863	32.3
1864	32.3
1865	32.3
1866	32.3
1867	32.3
1868	32.3
1869	32.3
1870	32.3
1871	32.3
1872	32.3
1873	32.31
1874	32.31
1875	32.31
1876	32.31
1877	32.32
1878	32.32
1879	32.32
1880	32.32
1881	32.33
1882	32.33
1883	32.33
1884	32.33
1885	32.33
1886	32.34
1887	32.34
1888	32.34
1889	32.34
1890	32.35
1891	32.35
1892	32.35
1893	32.35
1894	32.36
1895	32.36
1896	32.36
1897	32.36
1898	32.37
1899	32.37
1900	32.37
1901	32.37
1902	32.37
1903	32.38
1904	32.38
1905	32.38
1906	32.38
1907	32.39
1908	32.39
1909	32.39
1910	32.39
1911	32.4
1912	32.4
1913	32.4
1914	32.4
1915	32.4
1916	32.41
1917	32.41
1918	26.87
1919	32.41
1920	32.42
1921	32.42
1922	32.42
1923	32.42
1924	32.43
1925	32.43
1926	32.43
1927	32.43
1928	32.43
1929	32.44
1930	32.44
1931	32.44
1932	32.44
1933	32.45
1934	32.45
1935	32.45
1936	32.45
1937	32.46
1938	32.46
1939	32.46
1940	32.46
1941	32.47
1942	32.47
1943	32.47
1944	32.47
1945	32.47
1946	32.86
1947	33.24
1948	33.63
1949	34
1950	34.39
1951	34.86
1952	35.81
1953	36.75
1954	37.67
1955	38.57
1956	39.47
1957	40.36
1958	41.24
1959	42.1
1960	42.95
1961	43.78
1962	44.6
1963	45.41
1964	46.21
1965	46.99
1966	47.74
1967	48.48
1968	49.2
1969	49.93
1970	50.67
1971	52.12
1972	52.8
1973	53.84
1974	55.09
1975	56.32
1976	58.27
1977	59.19
1978	60.48
1979	61.53
1980	62.6
1981	63.65
1982	64.69
1983	65.74
1984	66.69
1985	67.64
1986	68.45
1987	69.1
1988	69.63
1989	70.13
1990	70.7
1991	71.2
1992	71.7
1993	72.16
1994	72.52
1995	72.88
1996	73.25
1997	73.63
1998	73.98
1999	74.3
2000	74.55
2001	74.78
2002	75
2003	75.23
2004	75.65
2005	76.02
2006	76.13
2007	76.14
2008	76.42
2009	76.27
2010	76.09
2011	76.38
2012	76.73
2013	76.94
2014	77.16
2015	77.38
2016	77.6
2017	77.83
2018	78.06