Year	Years
1800	31.87
1801	31.87
1802	31.87
1803	31.87
1804	31.87
1805	31.87
1806	31.87
1807	31.87
1808	31.87
1809	31.87
1810	31.87
1811	31.87
1812	31.87
1813	31.87
1814	31.87
1815	31.87
1816	31.87
1817	31.87
1818	31.87
1819	31.87
1820	31.87
1821	31.87
1822	31.87
1823	31.87
1824	31.87
1825	31.87
1826	31.87
1827	31.87
1828	31.87
1829	31.87
1830	31.87
1831	31.87
1832	31.87
1833	31.87
1834	31.87
1835	31.87
1836	31.87
1837	31.87
1838	31.87
1839	31.87
1840	31.87
1841	31.87
1842	31.87
1843	31.87
1844	31.87
1845	31.87
1846	31.87
1847	31.87
1848	31.87
1849	31.87
1850	31.87
1851	31.87
1852	31.87
1853	31.87
1854	31.87
1855	31.87
1856	31.87
1857	31.87
1858	31.87
1859	31.87
1860	31.87
1861	31.87
1862	31.87
1863	31.87
1864	31.35
1865	30.82
1866	30.3
1867	29.78
1868	29.25
1869	29.3
1870	29.34
1871	29.37
1872	29.4
1873	29.43
1874	29.61
1875	29.8
1876	29.99
1877	30.17
1878	30.36
1879	30.54
1880	30.72
1881	30.91
1882	31.09
1883	31.28
1884	31.46
1885	31.65
1886	31.83
1887	32.01
1888	32.19
1889	32.38
1890	32.56
1891	32.74
1892	32.93
1893	33.11
1894	33.29
1895	33.47
1896	33.65
1897	33.83
1898	33.65
1899	33.48
1900	33.29
1901	33.52
1902	33.75
1903	33.98
1904	34.21
1905	34.44
1906	34.67
1907	34.9
1908	35.13
1909	35.36
1910	35.59
1911	38.47
1912	38.87
1913	36.72
1914	36.3
1915	35.89
1916	35.88
1917	32.93
1918	24.44
1919	34.19
1920	36.13
1921	32.21
1922	34.63
1923	35.1
1924	34.11
1925	38.32
1926	41.42
1927	40.76
1928	42.2
1929	40.97
1930	40.29
1931	39.34
1932	36.89
1933	23.29
1934	42.5
1935	43.99
1936	45.59
1937	44.61
1938	46.21
1939	48.51
1940	46.1
1941	32.19
1942	28.79
1943	26.85
1944	33.78
1945	43.41
1946	52.71
1947	44.98
1948	52.73
1949	55.4
1950	57.59
1951	57.75
1952	58.12
1953	58.47
1954	58.83
1955	59.18
1956	59.54
1957	59.89
1958	60.25
1959	60.6
1960	60.95
1961	61.32
1962	61.68
1963	62.04
1964	62.4
1965	62.76
1966	63.1
1967	63.43
1968	63.73
1969	64.01
1970	64.29
1971	64.85
1972	65.35
1973	65.92
1974	66.44
1975	66.85
1976	67.28
1977	67.72
1978	68.16
1979	68.56
1980	68.95
1981	69.32
1982	69.6
1983	69.76
1984	69.75
1985	69.74
1986	69.83
1987	69.83
1988	69.75
1989	69.63
1990	69.57
1991	69.46
1992	68.86
1993	68.54
1994	69.68
1995	70.44
1996	71.15
1997	71.29
1998	71.36
1999	71.51
2000	71.71
2001	71.98
2002	71.85
2003	71.73
2004	71.62
2005	72.03
2006	72.45
2007	72.71
2008	72.34
2009	72.69
2010	72.82
2011	72.96
2012	73.13
2013	73.29
2014	73.47
2015	73.68
2016	73.95
2017	74.13
2018	74.31