Year	Years
1800	31.5
1801	31.5
1802	31.5
1803	31.5
1804	31.5
1805	31.5
1806	31.5
1807	31.5
1808	31.5
1809	31.5
1810	31.5
1811	31.5
1812	31.5
1813	31.5
1814	31.5
1815	31.5
1816	31.5
1817	31.5
1818	31.5
1819	31.5
1820	31.5
1821	31.5
1822	31.5
1823	31.5
1824	31.5
1825	31.5
1826	31.5
1827	31.5
1828	31.5
1829	31.5
1830	31.5
1831	31.5
1832	31.5
1833	31.5
1834	31.5
1835	31.5
1836	31.5
1837	31.5
1838	31.5
1839	31.5
1840	31.5
1841	31.5
1842	31.5
1843	31.5
1844	31.5
1845	31.5
1846	31.5
1847	31.5
1848	31.5
1849	31.5
1850	31.5
1851	31.5
1852	31.5
1853	31.5
1854	31.5
1855	31.5
1856	31.5
1857	31.5
1858	31.5
1859	31.5
1860	31.5
1861	31.5
1862	31.5
1863	31.5
1864	31.5
1865	31.5
1866	31.5
1867	31.5
1868	31.5
1869	31.5
1870	31.5
1871	31.55
1872	31.61
1873	31.66
1874	31.72
1875	31.77
1876	31.83
1877	31.88
1878	31.94
1879	31.99
1880	32.05
1881	32.1
1882	32.16
1883	32.21
1884	32.27
1885	32.32
1886	32.38
1887	32.43
1888	32.49
1889	32.54
1890	32.6
1891	32.65
1892	32.7
1893	32.76
1894	32.81
1895	32.87
1896	32.92
1897	32.98
1898	33.03
1899	33.09
1900	33.14
1901	33.2
1902	33.25
1903	33.31
1904	33.36
1905	33.42
1906	33.47
1907	33.53
1908	33.58
1909	33.64
1910	33.69
1911	33.74
1912	33.8
1913	33.85
1914	33.91
1915	33.96
1916	34.02
1917	34.07
1918	34.13
1919	34.18
1920	34.24
1921	34.29
1922	34.35
1923	34.4
1924	34.46
1925	34.51
1926	34.57
1927	34.62
1928	34.68
1929	34.73
1930	34.79
1931	34.84
1932	34.89
1933	34.95
1934	35
1935	35.06
1936	35.11
1937	35.17
1938	35.22
1939	35.28
1940	35.33
1941	35.39
1942	34.88
1943	33.81
1944	32.73
1945	31.65
1946	35.66
1947	36.34
1948	37.01
1949	37.69
1950	38.36
1951	38.71
1952	39.34
1953	39.97
1954	40.59
1955	41.2
1956	41.83
1957	42.45
1958	43.07
1959	43.74
1960	44.44
1961	45.19
1962	46.03
1963	46.93
1964	47.91
1965	48.94
1966	50
1967	51.06
1968	52.08
1969	53.07
1970	54.01
1971	54.2
1972	54.52
1973	54.74
1974	54.92
1975	55.07
1976	55.18
1977	55.23
1978	55.29
1979	55.32
1980	55.33
1981	55.34
1982	55.36
1983	55.38
1984	55.46
1985	55.51
1986	55.61
1987	55.76
1988	55.86
1989	55.99
1990	56
1991	55.9
1992	56.14
1993	56.43
1994	56.74
1995	56.96
1996	57.22
1997	57.39
1998	56.71
1999	57.57
2000	57.64
2001	57.62
2002	57.6
2003	57.6
2004	57.6
2005	57.65
2006	57.75
2007	57.9
2008	58.21
2009	58.43
2010	58.7
2011	59.04
2012	59.29
2013	59.75
2014	60.12
2015	60.49
2016	60.84
2017	60.99
2018	61.14