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	31
1852	30
1853	29
1854	28
1855	27
1856	26
1857	26.71
1858	27.43
1859	28.14
1860	28.85
1861	29.56
1862	30.28
1863	30.99
1864	31.7
1865	31.74
1866	31.79
1867	31.83
1868	31.87
1869	31.91
1870	31.96
1871	31.99
1872	31.98
1873	31.98
1874	31.97
1875	31.96
1876	29.45
1877	27.45
1878	25.15
1879	28.43
1880	31.92
1881	31.91
1882	31.9
1883	31.89
1884	31.88
1885	31.88
1886	31.87
1887	31.86
1888	31.85
1889	31.84
1890	31.84
1891	31.83
1892	31.82
1893	31.81
1894	31.8
1895	31.79
1896	31.79
1897	31.78
1898	31.77
1899	31.76
1900	31.75
1901	31.74
1902	31.74
1903	31.73
1904	31.72
1905	31.71
1906	31.7
1907	31.7
1908	31.69
1909	31.68
1910	31.67
1911	31.66
1912	31.65
1913	31.65
1914	31.64
1915	31.63
1916	31.62
1917	31.61
1918	22.13
1919	31.6
1920	31.59
1921	31.58
1922	31.57
1923	31.56
1924	31.56
1925	31.55
1926	31.89
1927	25.27
1928	32.59
1929	29.4
1930	33.28
1931	33.66
1932	34.05
1933	34.43
1934	34.82
1935	35.2
1936	35.59
1937	33.41
1938	33.27
1939	33.5
1940	33.74
1941	33.38
1942	31.41
1943	28.46
1944	34.33
1945	36.29
1946	37.75
1947	38.82
1948	39.3
1949	39.77
1950	40.73
1951	41.69
1952	42.65
1953	43.61
1954	45.47
1955	46.97
1956	49.33
1957	49.42
1958	49.02
1959	37.52
1960	30.9
1961	33.3
1962	43.45
1963	50.66
1964	52.03
1965	54.29
1966	55.4
1967	56.92
1968	57.91
1969	59.42
1970	61.04
1971	61.64
1972	62.14
1973	62.63
1974	62.98
1975	63.26
1976	62.84
1977	63.64
1978	63.88
1979	64.04
1980	64.22
1981	64.34
1982	64.86
1983	65.33
1984	65.71
1985	66.08
1986	66.32
1987	66.64
1988	66.69
1989	66.74
1990	67.05
1991	67.3
1992	67.5
1993	67.74
1994	68.02
1995	68.36
1996	68.7
1997	69.01
1998	69.34
1999	69.7
2000	70.03
2001	70.32
2002	70.65
2003	71.34
2004	71.91
2005	72.4
2006	73.01
2007	73.51
2008	73.75
2009	74.28
2010	74.59
2011	75.06
2012	75.43
2013	75.72
2014	75.89
2015	76.26
2016	76.6
2017	76.76
2018	76.92