Year	Years
1800	32
1801	32
1802	32
1803	32
1804	32
1805	32
1806	32
1807	32
1808	32
1809	32
1810	32
1811	32
1812	32
1813	32
1814	32
1815	32
1816	32
1817	32
1818	32
1819	32
1820	32
1821	32
1822	32
1823	32
1824	32
1825	32
1826	32
1827	32
1828	32
1829	32
1830	32
1831	32
1832	32
1833	32
1834	32
1835	32
1836	32
1837	32
1838	32
1839	32
1840	32
1841	32
1842	32
1843	32
1844	32
1845	32
1846	32
1847	32
1848	32
1849	32
1850	32
1851	32
1852	32
1853	32
1854	32
1855	32
1856	32
1857	32
1858	32
1859	32
1860	32
1861	32
1862	32
1863	32
1864	32
1865	32
1866	32
1867	32
1868	32
1869	32
1870	32
1871	31.99
1872	31.99
1873	31.98
1874	31.97
1875	31.96
1876	31.96
1877	31.95
1878	31.94
1879	31.94
1880	31.93
1881	31.92
1882	31.91
1883	31.91
1884	31.9
1885	31.89
1886	31.89
1887	31.88
1888	31.87
1889	31.86
1890	31.86
1891	31.85
1892	31.84
1893	31.84
1894	31.83
1895	31.82
1896	31.81
1897	31.81
1898	31.8
1899	31.79
1900	31.79
1901	31.78
1902	31.77
1903	31.76
1904	31.76
1905	31.75
1906	31.74
1907	31.74
1908	31.73
1909	31.72
1910	31.71
1911	31.71
1912	31.7
1913	31.69
1914	31.69
1915	31.68
1916	31.67
1917	31.67
1918	26.25
1919	31.65
1920	31.64
1921	31.64
1922	31.63
1923	31.62
1924	31.62
1925	31.61
1926	31.6
1927	31.59
1928	31.59
1929	31.58
1930	31.57
1931	31.57
1932	31.56
1933	31.55
1934	31.54
1935	31.54
1936	33.64
1937	35.75
1938	37.85
1939	39.96
1940	42.05
1941	44.16
1942	46.26
1943	48.36
1944	50.45
1945	52.56
1946	54.65
1947	56.75
1948	58.84
1949	60.94
1950	63.03
1951	63.34
1952	63.94
1953	64.51
1954	65.02
1955	65.5
1956	65.93
1957	66.33
1958	66.7
1959	67.02
1960	67.32
1961	67.61
1962	67.88
1963	68.14
1964	68.4
1965	68.64
1966	68.87
1967	69.08
1968	69.26
1969	69.43
1970	69.6
1971	71.05
1972	71.12
1973	66.64
1974	71.29
1975	71.55
1976	72.09
1977	72.54
1978	72.91
1979	73.29
1980	73.62
1981	73.83
1982	73.99
1983	74.05
1984	74.25
1985	74.5
1986	74.63
1987	74.88
1988	75.15
1989	75.62
1990	75.83
1991	75.91
1992	76.01
1993	76.32
1994	76.57
1995	76.97
1996	77.3
1997	77.61
1998	77.94
1999	78.23
2000	78.46
2001	78.58
2002	78.53
2003	79.01
2004	79.31
2005	79.68
2006	79.78
2007	80.2
2008	80.52
2009	80.86
2010	81.42
2011	81.63
2012	81.9
2013	82.01
2014	81.36
2015	82.02
2016	82.08
2017	82.25
2018	82.41