Year	Years
1800	29.9
1801	29.9
1802	29.9
1803	29.9
1804	29.9
1805	29.9
1806	29.9
1807	29.9
1808	29.9
1809	29.9
1810	29.9
1811	29.9
1812	29.9
1813	29.9
1814	29.9
1815	29.9
1816	29.9
1817	29.9
1818	29.9
1819	29.9
1820	29.9
1821	29.9
1822	29.9
1823	29.9
1824	29.9
1825	29.9
1826	29.9
1827	29.9
1828	29.9
1829	29.9
1830	29.9
1831	29.9
1832	29.9
1833	29.9
1834	29.9
1835	29.9
1836	29.9
1837	29.9
1838	29.9
1839	29.9
1840	29.9
1841	29.9
1842	29.9
1843	29.9
1844	29.9
1845	29.9
1846	29.9
1847	29.9
1848	29.9
1849	29.9
1850	29.9
1851	29.9
1852	29.9
1853	29.9
1854	29.9
1855	29.9
1856	29.9
1857	29.9
1858	29.9
1859	29.9
1860	29.9
1861	29.9
1862	29.9
1863	29.9
1864	29.9
1865	29.9
1866	29.9
1867	29.9
1868	29.9
1869	29.9
1870	29.9
1871	29.96
1872	30.03
1873	30.09
1874	30.16
1875	30.22
1876	30.29
1877	30.35
1878	30.42
1879	30.48
1880	30.55
1881	30.61
1882	30.67
1883	30.74
1884	30.8
1885	30.87
1886	30.93
1887	31
1888	31.06
1889	31.13
1890	31.19
1891	31.26
1892	31.32
1893	31.39
1894	31.45
1895	31.51
1896	31.58
1897	31.64
1898	31.71
1899	31.77
1900	31.84
1901	31.9
1902	31.97
1903	32.03
1904	32.1
1905	32.16
1906	32.22
1907	32.29
1908	32.35
1909	32.42
1910	32.48
1911	32.55
1912	32.61
1913	32.68
1914	32.74
1915	32.81
1916	32.87
1917	32.93
1918	12.76
1919	33.06
1920	33.13
1921	33.19
1922	33.26
1923	33.32
1924	33.39
1925	33.45
1926	33.52
1927	33.58
1928	33.65
1929	33.71
1930	33.77
1931	33.84
1932	33.9
1933	33.97
1934	34.03
1935	34.1
1936	34.16
1937	34.23
1938	34.29
1939	34.36
1940	34.42
1941	34.48
1942	34.55
1943	34.61
1944	34.68
1945	34.74
1946	37.25
1947	39.76
1948	42.29
1949	44.81
1950	47.36
1951	47.62
1952	48.08
1953	48.57
1954	49.1
1955	49.63
1956	50.19
1957	50.77
1958	51.37
1959	51.98
1960	52.6
1961	53.21
1962	53.81
1963	54.41
1964	55.01
1965	55.64
1966	56.32
1967	57.09
1968	57.93
1969	58.85
1970	59.78
1971	59.44
1972	60.29
1973	60.58
1974	60.73
1975	60.84
1976	61.14
1977	61.2
1978	61.18
1979	60.7
1980	61.1
1981	60.9
1982	61.04
1983	60.99
1984	61.04
1985	61.08
1986	61.19
1987	61.3
1988	61.35
1989	61.4
1990	61.27
1991	61.2
1992	61.02
1993	61.2
1994	60.8
1995	61.37
1996	61.39
1997	61.25
1998	61.37
1999	61.32
2000	61.37
2001	61.53
2002	61.58
2003	61.68
2004	61.69
2005	62.04
2006	61.93
2007	62.55
2008	62.91
2009	63.33
2010	63.69
2011	64.15
2012	64.61
2013	65.1
2014	65.61
2015	66.07
2016	66.73
2017	66.92
2018	67.1