Year	Years
1800	31
1801	31
1802	31
1803	31
1804	31
1805	31
1806	31
1807	31
1808	31
1809	31
1810	31
1811	31
1812	31
1813	31
1814	31
1815	31
1816	31
1817	31
1818	31
1819	31
1820	31
1821	31
1822	31
1823	31
1824	31
1825	31
1826	31
1827	31
1828	31
1829	31
1830	31
1831	31
1832	31
1833	31
1834	31
1835	31
1836	31
1837	31
1838	31
1839	31
1840	31
1841	31
1842	31
1843	31
1844	31
1845	31
1846	31
1847	31
1848	31
1849	31
1850	31
1851	31
1852	31
1853	31
1854	31
1855	31
1856	31
1857	31
1858	31
1859	31
1860	31
1861	31
1862	31
1863	31
1864	31
1865	31
1866	31
1867	31
1868	31
1869	31
1870	31
1871	31.01
1872	31.03
1873	31.04
1874	31.06
1875	31.07
1876	31.09
1877	31.1
1878	31.12
1879	31.13
1880	31.15
1881	31.16
1882	31.17
1883	31.19
1884	31.2
1885	31.22
1886	31.23
1887	31.25
1888	31.26
1889	31.28
1890	31.29
1891	31.31
1892	31.32
1893	31.33
1894	31.35
1895	31.36
1896	31.38
1897	31.39
1898	31.41
1899	31.42
1900	31.44
1901	31.45
1902	31.47
1903	31.48
1904	31.5
1905	31.51
1906	31.52
1907	31.54
1908	31.55
1909	31.57
1910	31.58
1911	31.6
1912	31.61
1913	31.63
1914	31.64
1915	31.66
1916	31.67
1917	31.68
1918	12.26
1919	31.71
1920	31.73
1921	31.74
1922	31.76
1923	31.77
1924	31.79
1925	31.8
1926	31.82
1927	31.83
1928	31.84
1929	31.86
1930	31.87
1931	31.89
1932	31.9
1933	31.92
1934	31.93
1935	31.95
1936	32.96
1937	33.98
1938	34.99
1939	36.01
1940	37.03
1941	38.05
1942	39.07
1943	40.09
1944	41.11
1945	42.13
1946	43.16
1947	44.18
1948	45.21
1949	46.23
1950	47.26
1951	47.49
1952	47.94
1953	48.42
1954	48.93
1955	49.47
1956	50.03
1957	50.63
1958	51.23
1959	51.86
1960	52.5
1961	53.13
1962	53.74
1963	54.33
1964	54.92
1965	55.49
1966	56.06
1967	56.64
1968	57.23
1969	57.84
1970	58.48
1971	59.23
1972	59.87
1973	60.49
1974	61.05
1975	61.6
1976	62.08
1977	62.58
1978	62.91
1979	63.1
1980	62.99
1981	62.78
1982	62.58
1983	62.26
1984	62.11
1985	62.4
1986	62.82
1987	63.15
1988	63.24
1989	62.29
1990	63.25
1991	63.44
1992	63.5
1993	63.53
1994	63.73
1995	63.78
1996	63.63
1997	63.66
1998	63.8
1999	64.17
2000	64.56
2001	64.99
2002	65.32
2003	65.75
2004	66.04
2005	66.14
2006	66.84
2007	67.32
2008	67.7
2009	68.44
2010	68.91
2011	69.29
2012	69.28
2013	69.71
2014	70.01
2015	70.29
2016	70.57
2017	70.71
2018	70.86