Year	Years
1800	23.39
1801	23.39
1802	23.39
1803	23.39
1804	23.39
1805	23.39
1806	23.39
1807	23.39
1808	23.39
1809	23.39
1810	23.39
1811	23.39
1812	23.39
1813	23.39
1814	23.39
1815	23.39
1816	23.39
1817	23.39
1818	23.39
1819	23.39
1820	23.39
1821	23.39
1822	23.39
1823	23.39
1824	23.39
1825	23.39
1826	23.39
1827	23.39
1828	23.39
1829	23.39
1830	23.39
1831	23.39
1832	23.39
1833	23.39
1834	23.39
1835	23.39
1836	23.39
1837	23.39
1838	23.39
1839	23.39
1840	23.39
1841	23.39
1842	23.39
1843	23.39
1844	23.39
1845	23.39
1846	23.39
1847	23.39
1848	23.39
1849	23.39
1850	23.39
1851	23.39
1852	23.39
1853	23.39
1854	23.39
1855	23.39
1856	23.39
1857	23.39
1858	23.39
1859	23.39
1860	23.39
1861	23.39
1862	23.39
1863	23.39
1864	23.39
1865	23.39
1866	23.39
1867	23.39
1868	23.39
1869	23.39
1870	23.39
1871	23.39
1872	23.4
1873	23.4
1874	23.41
1875	23.41
1876	23.42
1877	23.42
1878	23.43
1879	23.43
1880	23.44
1881	23.44
1882	23.44
1883	23.45
1884	23.45
1885	23.46
1886	23.46
1887	23.47
1888	23.47
1889	23.48
1890	23.48
1891	23.49
1892	23.49
1893	23.5
1894	23.5
1895	23.5
1896	23.51
1897	23.51
1898	23.52
1899	23.52
1900	23.53
1901	23.53
1902	23.54
1903	23.54
1904	23.55
1905	23.55
1906	23.55
1907	23.56
1908	23.56
1909	23.57
1910	23.57
1911	23.58
1912	23.58
1913	23.59
1914	23.59
1915	23.6
1916	23.6
1917	23.61
1918	19.57
1919	23.61
1920	23.62
1921	23.62
1922	23.63
1923	23.63
1924	23.64
1925	23.64
1926	23.65
1927	23.65
1928	23.66
1929	23.66
1930	23.66
1931	23.67
1932	23.67
1933	23.68
1934	23.68
1935	23.69
1936	23.69
1937	23.7
1938	23.7
1939	23.71
1940	23.71
1941	23.72
1942	23.72
1943	23.72
1944	23.73
1945	23.73
1946	23.74
1947	23.74
1948	23.75
1949	23.75
1950	23.76
1951	24.24
1952	25.21
1953	26.18
1954	27.14
1955	28.11
1956	29.08
1957	30.05
1958	31.03
1959	31.99
1960	32.96
1961	33.91
1962	34.87
1963	35.8
1964	36.73
1965	37.65
1966	38.54
1967	39.41
1968	40.28
1969	41.13
1970	41.99
1971	44.48
1972	45.44
1973	46.58
1974	47.62
1975	48.58
1976	49.66
1977	50.7
1978	51.53
1979	52.44
1980	53.15
1981	53.9
1982	54.12
1983	55.4
1984	56.04
1985	56.56
1986	54.58
1987	57.48
1988	57.89
1989	58.27
1990	58.71
1991	59.1
1992	59.45
1993	59.79
1994	59.89
1995	60.46
1996	60.8
1997	61.25
1998	61.66
1999	62.15
2000	62.61
2001	63.07
2002	63.53
2003	63.99
2004	64.51
2005	64.97
2006	65.52
2007	65.84
2008	66.4
2009	67.03
2010	67.51
2011	67.68
2012	67.91
2013	68.36
2014	68.44
2015	67.19
2016	66.72
2017	66.93
2018	67.14