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	31.97
1872	31.94
1873	31.91
1874	31.88
1875	31.85
1876	31.81
1877	31.78
1878	31.75
1879	31.72
1880	31.69
1881	31.66
1882	31.63
1883	31.6
1884	31.57
1885	31.54
1886	31.51
1887	31.48
1888	31.44
1889	31.41
1890	31.38
1891	31.35
1892	31.32
1893	31.29
1894	31.26
1895	31.23
1896	31.2
1897	31.17
1898	31.14
1899	31.11
1900	31.07
1901	31.04
1902	31.01
1903	30.98
1904	30.95
1905	30.92
1906	30.89
1907	30.86
1908	30.83
1909	30.8
1910	30.77
1911	30.74
1912	30.7
1913	30.67
1914	30.64
1915	30.61
1916	30.58
1917	30.55
1918	19.56
1919	30.49
1920	30.46
1921	30.43
1922	30.4
1923	30.37
1924	30.33
1925	30.3
1926	30.27
1927	30.24
1928	30.21
1929	30.18
1930	30.15
1931	30.28
1932	30.4
1933	30.53
1934	30.65
1935	30.77
1936	30.9
1937	32.13
1938	33.35
1939	34.58
1940	33.57
1941	32.7
1942	32.11
1943	30.68
1944	25.07
1945	15.77
1946	33.36
1947	38.88
1948	43.47
1949	46.19
1950	47.85
1951	48.2
1952	48.93
1953	49.63
1954	50.31
1955	50.96
1956	51.6
1957	52.2
1958	52.79
1959	53.36
1960	53.94
1961	54.5
1962	55.05
1963	55.57
1964	56.02
1965	56.31
1966	56.32
1967	56.01
1968	55.43
1969	54.65
1970	53.85
1971	54.53
1972	50.59
1973	54.62
1974	53.61
1975	61.19
1976	63.03
1977	63.42
1978	63.82
1979	63.14
1980	64.46
1981	64.92
1982	65.31
1983	65.7
1984	66.15
1985	66.53
1986	66.92
1987	67.25
1988	67.62
1989	67.9
1990	68.19
1991	68.43
1992	68.7
1993	68.95
1994	69.21
1995	69.49
1996	69.75
1997	69.93
1998	70.28
1999	70.49
2000	70.71
2001	70.93
2002	71.14
2003	71.34
2004	71.54
2005	71.77
2006	72.01
2007	72.28
2008	72.53
2009	72.79
2010	73.07
2011	73.34
2012	73.6
2013	73.83
2014	74.06
2015	74.28
2016	74.49
2017	74.68
2018	74.88