Year	Years
1800	30.6
1801	30.6
1802	30.6
1803	30.6
1804	30.6
1805	30.6
1806	30.6
1807	30.6
1808	30.6
1809	30.6
1810	30.6
1811	30.6
1812	30.6
1813	30.6
1814	30.6
1815	30.6
1816	30.6
1817	30.6
1818	30.6
1819	30.6
1820	30.6
1821	30.6
1822	30.6
1823	30.6
1824	30.6
1825	30.6
1826	30.6
1827	30.6
1828	30.6
1829	30.6
1830	30.6
1831	30.6
1832	30.6
1833	30.6
1834	30.6
1835	30.6
1836	30.6
1837	30.6
1838	30.6
1839	30.6
1840	30.6
1841	30.6
1842	30.6
1843	30.6
1844	30.6
1845	30.6
1846	30.6
1847	30.6
1848	30.6
1849	30.6
1850	30.6
1851	30.6
1852	30.6
1853	30.6
1854	30.6
1855	30.6
1856	30.6
1857	30.6
1858	30.6
1859	30.6
1860	30.6
1861	30.6
1862	30.6
1863	30.6
1864	30.6
1865	30.6
1866	30.6
1867	30.6
1868	30.6
1869	30.6
1870	30.6
1871	30.64
1872	30.67
1873	30.71
1874	30.74
1875	30.78
1876	30.81
1877	30.85
1878	30.88
1879	30.92
1880	30.95
1881	30.99
1882	31.03
1883	31.06
1884	31.1
1885	31.13
1886	31.17
1887	31.2
1888	31.24
1889	31.27
1890	31.31
1891	31.34
1892	31.38
1893	31.42
1894	31.45
1895	31.49
1896	31.52
1897	31.56
1898	31.59
1899	31.63
1900	31.66
1901	31.7
1902	31.73
1903	31.77
1904	31.81
1905	31.84
1906	31.88
1907	31.91
1908	31.95
1909	31.98
1910	32.02
1911	32.05
1912	32.09
1913	32.13
1914	32.16
1915	32.2
1916	32.23
1917	32.27
1918	12.49
1919	32.34
1920	32.37
1921	32.41
1922	32.44
1923	32.48
1924	32.52
1925	32.55
1926	32.59
1927	32.62
1928	32.66
1929	32.69
1930	32.73
1931	32.76
1932	32.8
1933	32.83
1934	32.87
1935	32.91
1936	32.94
1937	32.98
1938	33.01
1939	33.05
1940	33.08
1941	33.12
1942	33.15
1943	33.19
1944	33.22
1945	33.26
1946	34.46
1947	35.67
1948	36.88
1949	38.08
1950	39.29
1951	39.65
1952	40.29
1953	40.87
1954	41.38
1955	41.85
1956	42.26
1957	42.64
1958	42.98
1959	43.32
1960	43.7
1961	44.14
1962	44.69
1963	45.34
1964	46.12
1965	47.01
1966	47.98
1967	49.01
1968	50.04
1969	51.08
1970	52.08
1971	52.56
1972	53.06
1973	53.6
1974	54.37
1975	55.11
1976	55.98
1977	56.55
1978	56.93
1979	57.33
1980	57.74
1981	58.09
1982	58.36
1983	58.64
1984	58.95
1985	59.2
1986	59.95
1987	60.16
1988	59.88
1989	59.68
1990	59.46
1991	59.82
1992	60.13
1993	60.01
1994	59.79
1995	59.67
1996	59.3
1997	59.67
1998	59.65
1999	59.41
2000	59.15
2001	58.87
2002	59.23
2003	59.27
2004	59.31
2005	59.99
2006	60.52
2007	61.2
2008	61.47
2009	62.02
2010	62.86
2011	63.28
2012	63.9
2013	64.57
2014	65.33
2015	66
2016	66.61
2017	66.99
2018	67.33