Year	Years
1800	31.6
1801	31.6
1802	31.6
1803	31.6
1804	31.6
1805	31.6
1806	31.6
1807	31.6
1808	31.6
1809	31.6
1810	31.6
1811	31.6
1812	31.6
1813	31.6
1814	31.6
1815	31.6
1816	31.6
1817	31.6
1818	31.6
1819	31.6
1820	31.6
1821	31.6
1822	31.6
1823	31.6
1824	31.6
1825	31.6
1826	31.6
1827	31.6
1828	31.6
1829	31.6
1830	31.6
1831	31.6
1832	31.6
1833	31.6
1834	31.6
1835	31.6
1836	31.6
1837	31.6
1838	31.6
1839	31.6
1840	31.6
1841	31.6
1842	31.6
1843	31.6
1844	31.6
1845	31.6
1846	31.6
1847	31.6
1848	31.6
1849	31.6
1850	31.6
1851	31.6
1852	31.6
1853	31.6
1854	31.6
1855	31.6
1856	31.6
1857	31.6
1858	31.6
1859	31.6
1860	31.6
1861	31.6
1862	31.6
1863	31.6
1864	31.6
1865	31.6
1866	31.6
1867	31.6
1868	31.6
1869	31.6
1870	31.6
1871	31.65
1872	31.69
1873	31.74
1874	31.78
1875	31.83
1876	31.88
1877	31.92
1878	31.97
1879	32.02
1880	32.06
1881	32.11
1882	32.15
1883	32.2
1884	32.25
1885	32.29
1886	32.34
1887	32.38
1888	32.43
1889	32.48
1890	32.52
1891	32.57
1892	32.62
1893	32.66
1894	32.71
1895	32.75
1896	32.8
1897	32.85
1898	32.89
1899	32.94
1900	32.98
1901	33.03
1902	33.08
1903	33.12
1904	33.17
1905	33.21
1906	33.26
1907	33.31
1908	33.35
1909	33.4
1910	33.45
1911	33.49
1912	33.54
1913	33.58
1914	33.63
1915	33.68
1916	33.72
1917	33.77
1918	9.68
1919	33.86
1920	33.91
1921	33.95
1922	34
1923	34.05
1924	34.09
1925	34.14
1926	34.18
1927	34.23
1928	34.28
1929	34.32
1930	34.37
1931	34.41
1932	34.46
1933	34.51
1934	34.55
1935	34.6
1936	34.65
1937	34.69
1938	34.74
1939	34.78
1940	34.83
1941	35.62
1942	36.41
1943	37.2
1944	38.01
1945	38.8
1946	39.61
1947	40.4
1948	41.2
1949	42.02
1950	42.82
1951	43.09
1952	43.56
1953	44
1954	44.42
1955	44.82
1956	45.19
1957	45.54
1958	45.87
1959	46.19
1960	46.5
1961	46.8
1962	47.11
1963	47.43
1964	47.76
1965	48.12
1966	48.51
1967	48.94
1968	49.39
1969	49.86
1970	50.33
1971	50.6
1972	50.8
1973	51.1
1974	51.45
1975	51.62
1976	51.82
1977	52.04
1978	52.2
1979	52.46
1980	52.64
1981	52.81
1982	53.09
1983	53.43
1984	53.94
1985	54.19
1986	54.29
1987	54.23
1988	54.19
1989	54.06
1990	53.82
1991	53.62
1992	53.58
1993	53.48
1994	53.2
1995	53.14
1996	51.13
1997	52.47
1998	52.63
1999	53.06
2000	53.37
2001	53.6
2002	53.76
2003	54.03
2004	54.87
2005	55.36
2006	55.89
2007	56.15
2008	56.48
2009	56.9
2010	57.53
2011	58.03
2012	58.53
2013	59.33
2014	60.12
2015	60.93
2016	61.58
2017	62
2018	62.42