Year	Years
1800	32.6
1801	32.6
1802	32.6
1803	32.6
1804	32.6
1805	32.6
1806	32.6
1807	32.6
1808	32.6
1809	32.6
1810	32.6
1811	32.6
1812	32.6
1813	32.6
1814	32.6
1815	32.6
1816	32.6
1817	32.6
1818	32.6
1819	32.6
1820	32.6
1821	32.6
1822	32.6
1823	32.6
1824	32.6
1825	32.6
1826	32.6
1827	32.6
1828	32.6
1829	32.6
1830	32.6
1831	32.6
1832	32.6
1833	32.6
1834	32.6
1835	32.6
1836	32.6
1837	32.6
1838	32.6
1839	32.6
1840	32.6
1841	32.6
1842	32.6
1843	32.6
1844	32.6
1845	32.6
1846	32.6
1847	32.6
1848	32.6
1849	32.6
1850	32.6
1851	32.6
1852	32.6
1853	32.6
1854	32.6
1855	32.6
1856	32.6
1857	32.6
1858	32.6
1859	32.6
1860	32.6
1861	32.6
1862	32.6
1863	32.6
1864	32.6
1865	32.6
1866	32.6
1867	32.6
1868	32.6
1869	32.6
1870	32.6
1871	32.6
1872	32.61
1873	32.61
1874	32.62
1875	32.62
1876	32.62
1877	32.63
1878	32.63
1879	32.63
1880	32.64
1881	32.64
1882	32.65
1883	32.65
1884	32.65
1885	32.66
1886	32.66
1887	32.67
1888	32.67
1889	32.67
1890	32.68
1891	32.68
1892	32.69
1893	32.69
1894	32.69
1895	32.7
1896	32.7
1897	32.7
1898	32.71
1899	32.71
1900	32.72
1901	32.72
1902	32.8
1903	34.15
1904	35.02
1905	32.66
1906	27.15
1907	30.3
1908	30.76
1909	30.08
1910	33.01
1911	27.43
1912	29.14
1913	32.11
1914	29.35
1915	34.62
1916	32.94
1917	34.55
1918	28.36
1919	25.6
1920	31.28
1921	32.19
1922	36.26
1923	33.44
1924	38.1
1925	39.92
1926	38.67
1927	41.82
1928	37.9
1929	37.68
1930	38.46
1931	42.46
1932	44.48
1933	43.58
1934	41.49
1935	27.97
1936	42.84
1937	42.98
1938	43.86
1939	42.99
1940	44.39
1941	47.46
1942	47.74
1943	44.14
1944	44.15
1945	43.27
1946	46.21
1947	53.79
1948	53.52
1949	53.26
1950	52.98
1951	53.55
1952	54.64
1953	55.61
1954	56.51
1955	57.29
1956	57.99
1957	58.59
1958	59.12
1959	59.59
1960	60.02
1961	60.43
1962	60.85
1963	61.29
1964	61.77
1965	62.29
1966	62.83
1967	63.37
1968	63.9
1969	64.4
1970	64.87
1971	64.72
1972	64.73
1973	64.71
1974	64.44
1975	64.88
1976	65.48
1977	66.33
1978	67.35
1979	68.14
1980	68.89
1981	69.55
1982	69.68
1983	69.79
1984	69.78
1985	70.35
1986	70.79
1987	70.8
1988	71.12
1989	71.66
1990	71.58
1991	71.63
1992	72.19
1993	72.94
1994	73.02
1995	72.22
1996	72.11
1997	72.13
1998	72.22
1999	72.66
2000	72.75
2001	73.28
2002	73.53
2003	74.11
2004	69.58
2005	74.08
2006	74.39
2007	74.73
2008	74.05
2009	73.93
2010	74.42
2011	75.96
2012	76.3
2013	76.6
2014	76.87
2015	77.17
2016	77.4
2017	77.61
2018	77.82