Year	Years
1800	39.86
1801	39.86
1802	39.86
1803	39.86
1804	39.86
1805	39.86
1806	39.86
1807	39.86
1808	39.86
1809	39.86
1810	39.86
1811	39.86
1812	39.86
1813	39.86
1814	39.86
1815	39.86
1816	39.86
1817	39.86
1818	39.86
1819	39.86
1820	39.86
1821	39.86
1822	39.86
1823	39.86
1824	39.86
1825	39.86
1826	39.86
1827	39.86
1828	39.86
1829	39.86
1830	39.86
1831	39.86
1832	39.86
1833	39.86
1834	39.86
1835	39.86
1836	39.86
1837	39.86
1838	39.86
1839	39.86
1840	39.86
1841	39.86
1842	39.86
1843	39.86
1844	39.86
1845	39.86
1846	39.86
1847	39.86
1848	39.86
1849	39.86
1850	39.86
1851	40
1852	38.66
1853	38.63
1854	38.63
1855	34.53
1856	38.39
1857	35.46
1858	34.66
1859	30.86
1860	36.91
1861	36.44
1862	38.28
1863	38.33
1864	37.56
1865	36.37
1866	33.64
1867	39.31
1868	37.75
1869	40.47
1870	37.34
1871	32.94
1872	36.49
1873	39.2
1874	41.3
1875	38.24
1876	40.35
1877	42.03
1878	41.11
1879	41.97
1880	40.4
1881	42.88
1882	43.8
1883	42.36
1884	41.35
1885	43.31
1886	41.99
1887	45
1888	44.23
1889	44.36
1890	44.41
1891	44.26
1892	43.97
1893	45.82
1894	46.95
1895	46.66
1896	48.58
1897	49.38
1898	49.05
1899	49.37
1900	48.42
1901	48.74
1902	50.64
1903	51.54
1904	50.93
1905	52.14
1906	52.81
1907	53.57
1908	52.79
1909	54.99
1910	55.17
1911	53.2
1912	57.25
1913	57.41
1914	57.24
1915	57.26
1916	56.2
1917	55.71
1918	47.65
1919	55.02
1920	57.89
1921	59.82
1922	59.89
1923	62.11
1924	63.02
1925	63.23
1926	63.1
1927	62.71
1928	63.8
1929	62.25
1930	64.79
1931	64.41
1932	65.5
1933	66.15
1934	66.69
1935	66.61
1936	66.83
1937	67.05
1938	67.47
1939	67.8
1940	65.47
1941	65.4
1942	65.91
1943	64.5
1944	61.33
1945	55.52
1946	67.66
1947	69.61
1948	71.14
1949	70.37
1950	71.54
1951	71.6
1952	72.22
1953	71.8
1954	72.5
1955	72.62
1956	72.64
1957	73.09
1958	73.25
1959	73.29
1960	73.47
1961	73.66
1962	73.34
1963	73.46
1964	73.84
1965	73.71
1966	73.66
1967	73.93
1968	73.74
1969	73.65
1970	73.72
1971	73.83
1972	73.92
1973	74.19
1974	74.49
1975	74.65
1976	74.85
1977	75.16
1978	75.3
1979	75.59
1980	75.81
1981	75.98
1982	76.1
1983	76.22
1984	76.31
1985	76.37
1986	76.44
1987	76.68
1988	76.86
1989	76.88
1990	76.98
1991	77.12
1992	77.21
1993	77.2
1994	77.37
1995	77.48
1996	77.62
1997	77.83
1998	77.93
1999	77.96
2000	78.06
2001	78.22
2002	78.4
2003	78.67
2004	79.08
2005	79.42
2006	79.78
2007	80.11
2008	80.33
2009	80.54
2010	80.73
2011	80.92
2012	81.06
2013	81.29
2014	81.48
2015	81.62
2016	81.62
2017	81.77
2018	81.92