Year	Years
1800	33
1801	33
1802	33
1803	33
1804	33
1805	33
1806	33
1807	33
1808	33
1809	33
1810	33
1811	33
1812	33
1813	33
1814	33
1815	33
1816	33
1817	33
1818	33
1819	33
1820	33
1821	33
1822	33
1823	33
1824	33
1825	33
1826	33
1827	33
1828	33
1829	33
1830	33
1831	33
1832	33
1833	33
1834	33
1835	33
1836	33
1837	33
1838	33
1839	33
1840	33
1841	33
1842	33
1843	33
1844	33
1845	33
1846	33
1847	33
1848	33
1849	33
1850	33
1851	33
1852	33
1853	33
1854	33
1855	33
1856	33
1857	33
1858	33
1859	33
1860	33
1861	33.33
1862	33.66
1863	34
1864	34.33
1865	34.66
1866	34.99
1867	35.32
1868	35.66
1869	35.99
1870	36.32
1871	36.65
1872	36.98
1873	37.32
1874	37.65
1875	37.98
1876	38.31
1877	38.64
1878	38.97
1879	39.3
1880	39.63
1881	39.96
1882	40.3
1883	40.63
1884	40.96
1885	41.29
1886	41.62
1887	41.96
1888	42.28
1889	42.61
1890	42.94
1891	43.27
1892	43.61
1893	43.94
1894	44.27
1895	44.6
1896	44.93
1897	45.25
1898	45.55
1899	45.86
1900	46.17
1901	46.49
1902	46.8
1903	47.11
1904	47.42
1905	47.74
1906	48.04
1907	48.35
1908	48.66
1909	48.97
1910	49.29
1911	49.6
1912	49.91
1913	50.22
1914	49.46
1915	40.26
1916	40.06
1917	39.46
1918	35.47
1919	40.06
1920	47.66
1921	57.09
1922	55.51
1923	56.63
1924	53.64
1925	52.86
1926	55.81
1927	54.13
1928	54.83
1929	52.83
1930	55.95
1931	56.67
1932	56.54
1933	58.5
1934	55.46
1935	58
1936	57.48
1937	56.63
1938	59.85
1939	59.19
1940	51.93
1941	30.96
1942	43.14
1943	42.04
1944	23.46
1945	37.94
1946	54.89
1947	47.9
1948	58.58
1949	59.08
1950	59.62
1951	60.35
1952	61.75
1953	63.04
1954	64.23
1955	65.31
1956	66.28
1957	67.14
1958	67.9
1959	69.35
1960	70.18
1961	70.41
1962	69.78
1963	70.17
1964	71.41
1965	71.08
1966	71.05
1967	70.72
1968	70.34
1969	70.07
1970	70.09
1971	70.22
1972	69.9
1973	69.81
1974	69.63
1975	69.08
1976	69.15
1977	69.18
1978	69.02
1979	68.76
1980	68.9
1981	68.78
1982	69.35
1983	69.19
1984	69.22
1985	69.49
1986	70.69
1987	70.72
1988	70.75
1989	70.04
1990	69.46
1991	69.03
1992	68.38
1993	66.86
1994	65.86
1995	66.57
1996	68.5
1997	69.18
1998	68.95
1999	69.88
2000	70.42
2001	69.87
2002	70.22
2003	70.58
2004	70.93
2005	70.79
2006	70.45
2007	70.89
2008	71.89
2009	72.61
2010	73.06
2011	73.61
2012	74.03
2013	74.09
2014	74.61
2015	74.76
2016	74.87
2017	75
2018	75.13