Year	Years
1800	33.7
1801	33.7
1802	33.7
1803	33.7
1804	33.7
1805	33.7
1806	33.7
1807	33.7
1808	33.7
1809	33.7
1810	33.7
1811	33.7
1812	33.7
1813	33.7
1814	33.7
1815	33.7
1816	33.7
1817	33.7
1818	33.7
1819	33.7
1820	33.7
1821	33.7
1822	33.7
1823	33.7
1824	33.7
1825	33.7
1826	33.7
1827	33.7
1828	33.7
1829	33.7
1830	33.7
1831	33.7
1832	33.7
1833	33.7
1834	33.7
1835	33.7
1836	33.7
1837	33.7
1838	33.7
1839	33.7
1840	33.7
1841	33.7
1842	33.7
1843	33.7
1844	33.7
1845	33.7
1846	33.7
1847	33.7
1848	33.7
1849	33.7
1850	33.7
1851	33.7
1852	33.7
1853	33.7
1854	33.7
1855	33.7
1856	33.7
1857	33.7
1858	33.7
1859	33.7
1860	33.7
1861	33.7
1862	33.7
1863	33.7
1864	33.7
1865	33.7
1866	33.7
1867	33.7
1868	33.7
1869	33.7
1870	33.7
1871	33.72
1872	33.73
1873	33.75
1874	33.77
1875	33.78
1876	33.8
1877	33.82
1878	33.83
1879	33.85
1880	33.86
1881	33.88
1882	33.9
1883	33.91
1884	33.93
1885	33.95
1886	33.96
1887	33.98
1888	34
1889	34.01
1890	34.03
1891	34.05
1892	34.06
1893	34.08
1894	34.09
1895	34.11
1896	34.13
1897	34.14
1898	34.16
1899	34.18
1900	34.19
1901	34.21
1902	34.23
1903	34.24
1904	34.26
1905	34.28
1906	34.29
1907	34.31
1908	34.33
1909	34.34
1910	34.36
1911	34.37
1912	34.39
1913	34.41
1914	34.42
1915	34.44
1916	34.46
1917	34.47
1918	17.43
1919	34.51
1920	34.52
1921	34.54
1922	34.56
1923	34.57
1924	34.59
1925	34.61
1926	34.62
1927	34.64
1928	34.65
1929	34.67
1930	34.69
1931	34.7
1932	34.72
1933	34.74
1934	34.75
1935	34.77
1936	34.79
1937	34.8
1938	34.82
1939	34.84
1940	34.85
1941	36.32
1942	37.78
1943	39.25
1944	40.72
1945	42.19
1946	43.65
1947	45.13
1948	46.6
1949	48.08
1950	49.55
1951	49.8
1952	50.27
1953	50.73
1954	51.19
1955	51.64
1956	52.09
1957	52.54
1958	52.97
1959	53.4
1960	53.84
1961	54.25
1962	54.65
1963	55.04
1964	55.42
1965	55.8
1966	56.16
1967	56.53
1968	56.88
1969	57.24
1970	57.6
1971	57.94
1972	58.31
1973	58.46
1974	58.8
1975	59.07
1976	58.76
1977	58.36
1978	56.71
1979	57.18
1980	60.43
1981	61.28
1982	61.8
1983	62.21
1984	62.67
1985	63.09
1986	63.5
1987	63.57
1988	63.22
1989	62.69
1990	61.69
1991	61.04
1992	59.41
1993	57.58
1994	55.78
1995	53.69
1996	52.23
1997	50.75
1998	49.12
1999	47.81
2000	46.69
2001	46.2
2002	45.58
2003	45.34
2004	45.06
2005	45.31
2006	45.7
2007	46.38
2008	46.71
2009	47.55
2010	49.57
2011	51.9
2012	54.06
2013	55.59
2014	56.99
2015	58.27
2016	59.27
2017	59.8
2018	60.18