Year	Years
1800	33.8
1801	33.8
1802	33.8
1803	33.8
1804	33.8
1805	33.8
1806	33.8
1807	33.8
1808	33.8
1809	33.8
1810	33.8
1811	33.8
1812	33.8
1813	33.8
1814	33.8
1815	33.8
1816	33.8
1817	33.8
1818	33.8
1819	33.8
1820	33.8
1821	33.8
1822	33.8
1823	33.8
1824	33.8
1825	33.8
1826	33.8
1827	33.8
1828	33.8
1829	33.8
1830	33.8
1831	33.8
1832	33.8
1833	33.8
1834	33.8
1835	33.8
1836	33.8
1837	33.8
1838	33.8
1839	33.8
1840	33.8
1841	33.8
1842	33.8
1843	33.8
1844	33.8
1845	33.8
1846	33.8
1847	33.8
1848	33.8
1849	33.8
1850	33.8
1851	33.8
1852	33.8
1853	33.8
1854	33.8
1855	33.8
1856	33.8
1857	33.8
1858	33.8
1859	33.8
1860	33.8
1861	33.8
1862	33.8
1863	33.8
1864	33.8
1865	33.8
1866	33.8
1867	33.8
1868	33.8
1869	33.8
1870	33.8
1871	33.83
1872	33.87
1873	33.9
1874	33.94
1875	33.97
1876	34.01
1877	34.04
1878	34.08
1879	34.11
1880	34.15
1881	34.18
1882	34.22
1883	34.25
1884	34.29
1885	34.32
1886	34.35
1887	34.39
1888	34.42
1889	34.46
1890	34.49
1891	34.53
1892	34.56
1893	34.6
1894	34.63
1895	34.67
1896	34.7
1897	34.74
1898	34.77
1899	34.81
1900	34.84
1901	34.88
1902	34.91
1903	34.94
1904	34.98
1905	35.01
1906	35.05
1907	35.08
1908	35.12
1909	35.15
1910	35.19
1911	35.22
1912	35.26
1913	35.29
1914	35.33
1915	35.36
1916	35.4
1917	35.43
1918	13.71
1919	35.5
1920	35.53
1921	35.57
1922	35.6
1923	35.64
1924	35.67
1925	35.71
1926	35.74
1927	35.78
1928	35.81
1929	35.85
1930	35.88
1931	35.92
1932	35.95
1933	35.99
1934	36.02
1935	36.05
1936	37.08
1937	38.12
1938	39.15
1939	40.19
1940	41.23
1941	42.27
1942	43.31
1943	44.36
1944	45.4
1945	46.45
1946	47.51
1947	48.56
1948	49.61
1949	50.67
1950	51.72
1951	51.85
1952	52.04
1953	52.23
1954	52.43
1955	52.62
1956	52.82
1957	53.03
1958	53.23
1959	53.42
1960	53.6
1961	53.76
1962	53.93
1963	54.09
1964	54.29
1965	54.53
1966	54.88
1967	55.35
1968	55.96
1969	56.71
1970	57.57
1971	57.34
1972	58.9
1973	59.85
1974	61.01
1975	61.61
1976	62.38
1977	63.38
1978	64.18
1979	64.87
1980	65.21
1981	65.27
1982	65.28
1983	65.32
1984	65.14
1985	65.66
1986	66.06
1987	66.47
1988	66.92
1989	67.32
1990	67.82
1991	67.79
1992	67.95
1993	68.09
1994	68.29
1995	67.19
1996	68.67
1997	68.89
1998	69.14
1999	69.33
2000	69.75
2001	70.02
2002	70.29
2003	70.56
2004	70.82
2005	71.09
2006	71.38
2007	71.37
2008	71.99
2009	72.23
2010	72.45
2011	72.68
2012	72.83
2013	73.05
2014	73.27
2015	73.39
2016	73.65
2017	73.85
2018	74.06