Year	Years
1800	32.9
1801	32.9
1802	32.9
1803	32.9
1804	32.9
1805	32.9
1806	32.9
1807	32.9
1808	32.9
1809	32.9
1810	32.9
1811	32.9
1812	32.9
1813	32.9
1814	32.9
1815	32.9
1816	32.9
1817	32.9
1818	32.9
1819	32.9
1820	32.9
1821	32.9
1822	32.9
1823	32.9
1824	32.9
1825	32.9
1826	32.9
1827	32.9
1828	32.9
1829	32.9
1830	32.9
1831	32.9
1832	32.9
1833	32.9
1834	32.9
1835	32.9
1836	32.9
1837	32.9
1838	32.9
1839	33.88
1840	34.87
1841	35.85
1842	36.83
1843	37.82
1844	38.8
1845	38.8
1846	38.8
1847	38.8
1848	38.8
1849	38.8
1850	38.8
1851	38.8
1852	38.8
1853	38.8
1854	38.8
1855	38.8
1856	38.8
1857	38.8
1858	38.8
1859	38.8
1860	38.8
1861	38.8
1862	38.8
1863	38.8
1864	38.8
1865	38.8
1866	38.8
1867	38.8
1868	38.8
1869	38.8
1870	38.8
1871	38.8
1872	38.8
1873	38.81
1874	38.81
1875	38.81
1876	38.81
1877	38.82
1878	38.82
1879	38.82
1880	38.82
1881	38.83
1882	38.83
1883	38.83
1884	38.83
1885	38.84
1886	38.84
1887	38.84
1888	38.84
1889	38.85
1890	38.85
1891	38.85
1892	38.85
1893	38.85
1894	38.86
1895	38.86
1896	38.86
1897	38.86
1898	38.87
1899	38.87
1900	38.87
1901	38.87
1902	38.88
1903	38.88
1904	38.88
1905	38.88
1906	38.89
1907	38.89
1908	38.89
1909	38.89
1910	38.9
1911	38.9
1912	38.9
1913	38.9
1914	38.9
1915	38.91
1916	38.91
1917	38.91
1918	25.23
1919	38.92
1920	38.92
1921	38.92
1922	39.62
1923	40.31
1924	41.01
1925	41.7
1926	42.4
1927	43.09
1928	43.79
1929	44.48
1930	45.18
1931	45.87
1932	46.47
1933	47.05
1934	47.65
1935	48.24
1936	48.83
1937	49.42
1938	50.02
1939	50.6
1940	51.2
1941	51.8
1942	52.38
1943	52.98
1944	53.57
1945	54.16
1946	54.75
1947	55.36
1948	55.97
1949	56.56
1950	57.17
1951	57.4
1952	57.88
1953	58.41
1954	58.97
1955	59.59
1956	60.24
1957	60.92
1958	61.62
1959	62.31
1960	62.98
1961	63.57
1962	64.08
1963	64.5
1964	64.79
1965	65
1966	65.12
1967	65.21
1968	65.28
1969	65.37
1970	65.48
1971	65.58
1972	65.74
1973	65.96
1974	66.26
1975	66.51
1976	66.8
1977	67.13
1978	67.47
1979	67.74
1980	68.12
1981	68.38
1982	68.64
1983	68.69
1984	68.81
1985	68.96
1986	69.08
1987	69.13
1988	69.16
1989	69.17
1990	69.07
1991	69.18
1992	69.08
1993	69.18
1994	69.16
1995	69.33
1996	69.32
1997	69.44
1998	69.57
1999	69.34
2000	69.51
2001	69.76
2002	70.02
2003	70.49
2004	71.08
2005	71.34
2006	71.65
2007	72.07
2008	72.31
2009	72.5
2010	72.56
2011	72.66
2012	72.79
2013	72.9
2014	72.99
2015	73.07
2016	73.15
2017	73.26
2018	73.37