Year	Years
1800	30.4
1801	30.4
1802	30.4
1803	30.4
1804	30.4
1805	30.4
1806	30.4
1807	30.4
1808	30.4
1809	30.4
1810	30.4
1811	30.4
1812	30.4
1813	30.4
1814	30.4
1815	30.4
1816	30.4
1817	30.4
1818	30.4
1819	30.4
1820	30.4
1821	30.4
1822	30.4
1823	30.4
1824	30.4
1825	30.4
1826	30.4
1827	30.4
1828	30.4
1829	30.4
1830	30.4
1831	30.4
1832	30.4
1833	30.4
1834	30.4
1835	30.4
1836	30.4
1837	30.4
1838	30.4
1839	30.4
1840	30.4
1841	30.4
1842	30.4
1843	30.4
1844	30.4
1845	30.4
1846	30.4
1847	30.4
1848	30.4
1849	30.4
1850	30.4
1851	30.4
1852	30.4
1853	30.4
1854	30.4
1855	30.4
1856	30.4
1857	30.4
1858	30.4
1859	30.4
1860	30.4
1861	30.4
1862	30.4
1863	30.4
1864	30.4
1865	30.4
1866	30.4
1867	30.4
1868	30.4
1869	30.4
1870	30.4
1871	30.51
1872	30.62
1873	30.72
1874	30.83
1875	30.94
1876	31.05
1877	31.15
1878	31.26
1879	31.37
1880	31.48
1881	31.58
1882	31.69
1883	31.8
1884	31.91
1885	32.01
1886	32.12
1887	32.23
1888	32.34
1889	32.45
1890	32.55
1891	32.66
1892	32.77
1893	32.88
1894	32.98
1895	33.09
1896	33.2
1897	33.31
1898	33.41
1899	33.52
1900	33.63
1901	33.74
1902	33.85
1903	33.95
1904	34.06
1905	34.17
1906	34.28
1907	34.38
1908	34.49
1909	34.6
1910	34.71
1911	34.81
1912	34.92
1913	35.03
1914	35.14
1915	35.24
1916	35.35
1917	35.46
1918	16.8
1919	35.68
1920	35.78
1921	35.89
1922	36
1923	36.11
1924	36.21
1925	36.32
1926	36.43
1927	36.54
1928	36.64
1929	36.75
1930	36.86
1931	36.97
1932	37.08
1933	37.18
1934	37.29
1935	37.4
1936	37.51
1937	37.61
1938	37.72
1939	37.83
1940	37.94
1941	38.04
1942	38.15
1943	38.26
1944	38.37
1945	38.47
1946	39.33
1947	40.18
1948	41.04
1949	41.9
1950	42.77
1951	43.1
1952	43.64
1953	44.21
1954	44.83
1955	45.47
1956	46.14
1957	46.84
1958	47.56
1959	48.29
1960	49.04
1961	49.77
1962	50.5
1963	51.19
1964	51.86
1965	52.51
1966	53.14
1967	45.68
1968	39.07
1969	36.47
1970	50.1
1971	50.49
1972	50.97
1973	51.49
1974	52.1
1975	52.56
1976	53.01
1977	53.54
1978	53.97
1979	54.38
1980	54.65
1981	54.87
1982	55.1
1983	55.27
1984	55.4
1985	55.65
1986	55.46
1987	55.25
1988	55.08
1989	54.94
1990	54.89
1991	54.67
1992	54.67
1993	54.61
1994	54.77
1995	54.72
1996	54.49
1997	54.69
1998	54.64
1999	54.8
2000	54.92
2001	55.15
2002	55.15
2003	55.6
2004	56.14
2005	56.86
2006	57.49
2007	58.22
2008	59.02
2009	59.76
2010	60.53
2011	61.29
2012	61.95
2013	62.52
2014	63
2015	64.05
2016	65.05
2017	65.6
2018	66.14