Year	Years
1800	36.9
1801	36.9
1802	36.9
1803	36.9
1804	36.9
1805	36.9
1806	36.9
1807	36.9
1808	36.9
1809	36.9
1810	36.9
1811	36.9
1812	36.9
1813	36.9
1814	36.9
1815	36.9
1816	36.9
1817	36.9
1818	36.9
1819	36.9
1820	36.9
1821	36.9
1822	36.9
1823	36.9
1824	36.9
1825	36.9
1826	36.9
1827	36.9
1828	36.9
1829	36.9
1830	36.9
1831	36.9
1832	36.9
1833	36.9
1834	36.9
1835	36.9
1836	36.9
1837	36.9
1838	36.9
1839	36.9
1840	36.9
1841	36.9
1842	36.9
1843	36.9
1844	36.9
1845	36.9
1846	36.9
1847	36.9
1848	36.9
1849	36.9
1850	36.9
1851	36.9
1852	36.9
1853	36.9
1854	36.9
1855	36.9
1856	36.9
1857	36.9
1858	36.9
1859	36.9
1860	36.9
1861	36.9
1862	36.9
1863	36.9
1864	36.9
1865	36.9
1866	36.9
1867	36.9
1868	36.9
1869	36.9
1870	36.9
1871	36.9
1872	36.9
1873	36.91
1874	36.91
1875	36.91
1876	36.91
1877	36.92
1878	36.92
1879	36.92
1880	37.42
1881	37.94
1882	38.44
1883	38.94
1884	39.46
1885	39.96
1886	40.46
1887	40.98
1888	41.48
1889	41.98
1890	42.5
1891	43
1892	43.5
1893	44.02
1894	44.52
1895	45.03
1896	45.54
1897	46.04
1898	46.56
1899	47.06
1900	47.56
1901	48.08
1902	48.16
1903	47.01
1904	44.93
1905	46.32
1906	46.7
1907	49.12
1908	46.58
1909	47.91
1910	49.79
1911	46.51
1912	49.02
1913	50.38
1914	50.22
1915	51.62
1916	50.27
1917	48.2
1918	42.46
1919	44.82
1920	54.8
1921	56.4
1922	55.46
1923	54.87
1924	56.96
1925	54.99
1926	53.61
1927	56.07
1928	55.56
1929	52.91
1930	57.03
1931	57.82
1932	56.89
1933	58.56
1934	60.15
1935	59.35
1936	61.47
1937	61.33
1938	59.47
1939	60.62
1940	62.24
1941	60.27
1942	58.61
1943	54.58
1944	48.07
1945	49.64
1946	61.92
1947	63.38
1948	64.82
1949	65.18
1950	65.59
1951	65.77
1952	66.12
1953	66.45
1954	66.79
1955	67.1
1956	67.42
1957	67.72
1958	68.01
1959	68.3
1960	69.48
1961	69.99
1962	69.09
1963	69.31
1964	69.5
1965	69.84
1966	69.75
1967	70.14
1968	70.73
1969	70.3
1970	70.04
1971	70.2
1972	70.56
1973	70.75
1974	71.05
1975	71.24
1976	71.46
1977	71.9
1978	72.16
1979	72.36
1980	72.6
1981	72.76
1982	73
1983	73.33
1984	73.54
1985	73.82
1986	74.15
1987	74.36
1988	74.57
1989	74.8
1990	75.13
1991	75.47
1992	75.75
1993	76.06
1994	76.43
1995	76.77
1996	77
1997	77.26
1998	77.64
1999	78.02
2000	78.42
2001	78.66
2002	78.92
2003	79.04
2004	79.5
2005	79.95
2006	80.35
2007	80.66
2008	80.98
2009	81.18
2010	81.35
2011	81.48
2012	81.74
2013	81.92
2014	81.9
2015	81.99
2016	82.08
2017	82.24
2018	82.39