Year	Years
1800	34.7
1801	34.7
1802	34.7
1803	34.7
1804	34.7
1805	34.7
1806	34.7
1807	34.7
1808	34.7
1809	34.7
1810	34.7
1811	34.7
1812	34.7
1813	34.7
1814	34.7
1815	34.7
1816	34.7
1817	34.7
1818	34.7
1819	34.7
1820	34.7
1821	34.7
1822	34.7
1823	34.7
1824	34.7
1825	34.7
1826	34.7
1827	34.7
1828	34.7
1829	34.7
1830	34.7
1831	34.7
1832	34.7
1833	34.7
1834	34.7
1835	34.7
1836	34.7
1837	34.7
1838	34.7
1839	34.7
1840	34.7
1841	34.7
1842	34.7
1843	34.7
1844	34.7
1845	34.7
1846	34.7
1847	34.7
1848	34.7
1849	34.7
1850	34.7
1851	34.7
1852	34.7
1853	34.7
1854	34.7
1855	34.7
1856	34.7
1857	34.7
1858	34.7
1859	34.7
1860	34.7
1861	34.7
1862	34.7
1863	34.7
1864	34.7
1865	34.7
1866	34.7
1867	34.7
1868	34.7
1869	34.7
1870	34.7
1871	34.7
1872	34.7
1873	34.71
1874	34.71
1875	34.71
1876	34.71
1877	34.71
1878	34.71
1879	34.72
1880	34.72
1881	34.72
1882	34.72
1883	34.72
1884	34.73
1885	34.73
1886	34.73
1887	34.73
1888	34.73
1889	34.74
1890	34.74
1891	34.74
1892	34.74
1893	34.74
1894	34.74
1895	34.75
1896	34.75
1897	34.75
1898	34.75
1899	34.75
1900	34.76
1901	34.76
1902	34.76
1903	34.76
1904	34.76
1905	34.77
1906	34.77
1907	34.77
1908	34.77
1909	34.77
1910	34.77
1911	34.78
1912	34.78
1913	34.78
1914	34.78
1915	34.78
1916	34.79
1917	34.79
1918	22.3
1919	34.79
1920	34.79
1921	35.64
1922	36.49
1923	37.34
1924	38.18
1925	39.03
1926	39.88
1927	40.72
1928	41.57
1929	42.42
1930	43.27
1931	44.11
1932	44.96
1933	45.81
1934	46.66
1935	47.51
1936	48.36
1937	49.21
1938	50.05
1939	50.91
1940	51.75
1941	52.6
1942	53.45
1943	54.3
1944	55.15
1945	55.99
1946	56.85
1947	57.7
1948	58.54
1949	59.39
1950	60.25
1951	60.51
1952	61.06
1953	61.59
1954	62.12
1955	62.66
1956	63.18
1957	63.71
1958	64.22
1959	64.74
1960	65.24
1961	65.74
1962	66.23
1963	66.69
1964	67.15
1965	67.58
1966	68.01
1967	68.41
1968	68.81
1969	69.2
1970	69.57
1971	69.94
1972	70.28
1973	70.57
1974	70.87
1975	71.22
1976	71.57
1977	71.88
1978	72.24
1979	72.29
1980	72.5
1981	72.62
1982	73.15
1983	73.62
1984	73.98
1985	74.42
1986	74.65
1987	74.97
1988	75.17
1989	75.35
1990	75.87
1991	76.36
1992	76.75
1993	77.16
1994	77.6
1995	78.03
1996	78.4
1997	78.68
1998	78.95
1999	79.18
2000	79.43
2001	78.98
2002	79.63
2003	80.06
2004	80.39
2005	80.55
2006	80.83
2007	81.1
2008	81.27
2009	81.37
2010	81.55
2011	81.93
2012	82.25
2013	82.4
2014	82.45
2015	82.69
2016	82.96
2017	83.1
2018	83.24