Year	Years
1800	31.3
1801	31.3
1802	31.3
1803	31.3
1804	31.3
1805	31.3
1806	31.3
1807	31.3
1808	31.3
1809	31.3
1810	31.3
1811	31.3
1812	31.3
1813	31.3
1814	31.3
1815	31.3
1816	31.3
1817	31.3
1818	31.3
1819	31.3
1820	31.3
1821	31.3
1822	31.3
1823	31.3
1824	31.3
1825	31.3
1826	31.3
1827	31.3
1828	31.3
1829	31.3
1830	31.3
1831	31.3
1832	31.3
1833	31.3
1834	31.3
1835	31.3
1836	31.3
1837	31.3
1838	31.3
1839	31.3
1840	31.3
1841	31.3
1842	31.3
1843	31.3
1844	31.3
1845	31.3
1846	31.3
1847	31.3
1848	31.3
1849	31.3
1850	31.3
1851	31.3
1852	31.3
1853	31.3
1854	31.3
1855	31.3
1856	31.3
1857	31.3
1858	31.3
1859	31.3
1860	31.3
1861	31.3
1862	31.3
1863	31.3
1864	31.3
1865	31.3
1866	31.3
1867	31.3
1868	31.3
1869	31.3
1870	31.3
1871	31.34
1872	31.37
1873	31.41
1874	31.44
1875	31.48
1876	31.51
1877	31.55
1878	31.58
1879	31.62
1880	31.66
1881	31.69
1882	31.73
1883	31.76
1884	31.8
1885	31.83
1886	31.87
1887	31.9
1888	31.94
1889	31.98
1890	32.01
1891	32.05
1892	32.08
1893	32.12
1894	32.15
1895	32.19
1896	32.22
1897	32.26
1898	32.3
1899	32.33
1900	32.37
1901	32.4
1902	32.44
1903	32.47
1904	32.51
1905	32.54
1906	32.58
1907	32.62
1908	32.65
1909	32.69
1910	32.72
1911	32.76
1912	32.79
1913	32.83
1914	32.86
1915	32.9
1916	32.94
1917	32.97
1918	12.76
1919	33.04
1920	33.08
1921	33.11
1922	33.15
1923	33.18
1924	33.22
1925	33.26
1926	33.29
1927	33.33
1928	33.36
1929	33.4
1930	33.43
1931	33.47
1932	33.5
1933	33.54
1934	33.58
1935	33.61
1936	33.65
1937	33.68
1938	33.72
1939	33.75
1940	33.79
1941	33.82
1942	33.86
1943	33.9
1944	33.93
1945	33.97
1946	34.58
1947	35.18
1948	35.79
1949	36.4
1950	37.01
1951	37.42
1952	38.22
1953	39.01
1954	39.8
1955	40.57
1956	41.35
1957	42.12
1958	42.89
1959	43.66
1960	44.42
1961	45.17
1962	45.93
1963	46.68
1964	47.43
1965	48.16
1966	48.91
1967	49.65
1968	50.39
1969	51.13
1970	51.86
1971	52.33
1972	52.8
1973	53.18
1974	53.67
1975	54
1976	54.31
1977	54.67
1978	55.09
1979	55.51
1980	55.9
1981	56.2
1982	56.4
1983	56.5
1984	56.43
1985	56.65
1986	56.86
1987	56.65
1988	57.14
1989	57.15
1990	57.39
1991	57.42
1992	57.51
1993	57.36
1994	57.16
1995	57.16
1996	56.94
1997	56.46
1998	56.21
1999	56.43
2000	56.32
2001	56.17
2002	56.23
2003	56.01
2004	56.39
2005	56.41
2006	56.99
2007	57.14
2008	57.39
2009	58.04
2010	58.74
2011	59.63
2012	60.35
2013	60.92
2014	61.47
2015	62.06
2016	62.59
2017	62.85
2018	63.09