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	31.51
1872	31.51
1873	31.52
1874	31.52
1875	31.53
1876	31.54
1877	31.54
1878	31.55
1879	31.56
1880	31.56
1881	31.57
1882	31.57
1883	31.58
1884	31.59
1885	31.59
1886	31.6
1887	31.6
1888	31.61
1889	31.62
1890	31.62
1891	31.63
1892	31.64
1893	31.64
1894	31.65
1895	31.65
1896	31.66
1897	31.67
1898	31.67
1899	31.68
1900	31.69
1901	31.69
1902	31.7
1903	31.7
1904	31.71
1905	31.72
1906	31.72
1907	31.73
1908	31.73
1909	31.74
1910	31.75
1911	31.75
1912	31.76
1913	31.77
1914	31.77
1915	31.78
1916	31.78
1917	31.79
1918	12.29
1919	31.8
1920	31.81
1921	28.28
1922	24.75
1923	31.83
1924	31.83
1925	28.3
1926	26.29
1927	24.77
1928	26.3
1929	26.3
1930	31.87
1931	31.88
1932	31.88
1933	31.89
1934	31.89
1935	31.9
1936	31.91
1937	31.91
1938	31.92
1939	31.93
1940	31.93
1941	31.94
1942	31.94
1943	30.53
1944	17.75
1945	31.96
1946	33.38
1947	34.79
1948	36.2
1949	37.61
1950	39.03
1951	39.19
1952	39.5
1953	39.82
1954	40.13
1955	40.44
1956	40.76
1957	41.07
1958	41.38
1959	41.69
1960	42.02
1961	42.34
1962	42.67
1963	43
1964	43.32
1965	43.64
1966	43.92
1967	44.15
1968	44.36
1969	44.53
1970	44.69
1971	44.93
1972	18.24
1973	45.11
1974	45.18
1975	45.19
1976	45.32
1977	45.59
1978	45.77
1979	46.09
1980	46.31
1981	46.64
1982	46.92
1983	47.2
1984	47.43
1985	47.6
1986	47.69
1987	47.88
1988	48.01
1989	47.98
1990	47.99
1991	47.87
1992	47.75
1993	41.81
1994	47.55
1995	46.95
1996	46.58
1997	47
1998	47.28
1999	47.79
2000	47.91
2001	49.03
2002	49.87
2003	50.86
2004	52
2005	53.11
2006	54.32
2007	55.42
2008	56.32
2009	57.14
2010	57.73
2011	58.21
2012	58.75
2013	59.22
2014	59.59
2015	59.99
2016	60.36
2017	60.75
2018	61.14