Year	Years
1800	36.6
1801	36.6
1802	36.6
1803	36.6
1804	36.6
1805	36.6
1806	36.6
1807	36.6
1808	36.6
1809	36.6
1810	36.6
1811	36.6
1812	36.6
1813	36.6
1814	36.6
1815	36.6
1816	36.6
1817	36.6
1818	36.6
1819	36.6
1820	36.6
1821	36.6
1822	36.6
1823	36.6
1824	36.6
1825	36.6
1826	36.6
1827	36.6
1828	36.6
1829	36.6
1830	36.6
1831	36.6
1832	36.6
1833	36.6
1834	36.6
1835	36.6
1836	36.6
1837	36.6
1838	36.6
1839	36.6
1840	36.6
1841	36.6
1842	36.6
1843	36.6
1844	36.6
1845	36.6
1846	36.6
1847	36.6
1848	36.6
1849	36.6
1850	36.6
1851	36.6
1852	36.6
1853	36.6
1854	36.6
1855	36.6
1856	36.6
1857	36.6
1858	36.6
1859	36.6
1860	36.6
1861	36.6
1862	36.6
1863	36.6
1864	36.6
1865	36.6
1866	36.6
1867	36.6
1868	36.6
1869	36.6
1870	36.6
1871	36.59
1872	36.58
1873	36.57
1874	36.56
1875	36.55
1876	36.54
1877	36.53
1878	36.52
1879	36.51
1880	36.5
1881	36.5
1882	36.49
1883	36.48
1884	36.47
1885	36.46
1886	36.45
1887	36.44
1888	36.43
1889	36.42
1890	36.41
1891	36.4
1892	36.39
1893	36.38
1894	36.37
1895	36.36
1896	36.35
1897	36.34
1898	36.33
1899	36.32
1900	36.31
1901	36.7
1902	37.09
1903	37.47
1904	37.85
1905	38.24
1906	38.62
1907	39.01
1908	39.39
1909	39.77
1910	40.16
1911	40.54
1912	40.93
1913	41.31
1914	40.09
1915	34.59
1916	34.58
1917	32.6
1918	28.64
1919	30.6
1920	27.68
1921	30.93
1922	31.81
1923	40.58
1924	43.04
1925	42.14
1926	45.28
1927	44.38
1928	45.95
1929	44.06
1930	44
1931	44.97
1932	36.35
1933	8.9
1934	39.09
1935	48.76
1936	49.44
1937	48.19
1938	49.41
1939	49.2
1940	48.99
1941	24.49
1942	19.18
1943	17.9
1944	28.39
1945	34.86
1946	54.21
1947	44.34
1948	56.72
1949	59.45
1950	61.35
1951	60.99
1952	61.7
1953	62.37
1954	63.14
1955	64.93
1956	65.79
1957	65.82
1958	67.47
1959	67.82
1960	69.39
1961	69.65
1962	69.07
1963	69.66
1964	70.42
1965	69.86
1966	70.1
1967	69.69
1968	69.76
1969	69.14
1970	69.02
1971	69.16
1972	69.21
1973	69.41
1974	69.4
1975	69.13
1976	69.23
1977	68.96
1978	68.81
1979	68.62
1980	68.63
1981	68.71
1982	68.95
1983	69.15
1984	68.93
1985	69.42
1986	70.7
1987	70.62
1988	70.6
1989	70.24
1990	69.88
1991	69.31
1992	68.76
1993	68.24
1994	67.56
1995	66.62
1996	66.8
1997	67.37
1998	68.12
1999	67.75
2000	67.44
2001	67.66
2002	67.75
2003	67.76
2004	67.61
2005	67.25
2006	67.92
2007	67.73
2008	67.97
2009	69.58
2010	70.41
2011	71.1
2012	71.11
2013	71.26
2014	71.72
2015	71.93
2016	72
2017	72.15
2018	72.29