Year	Years
1800	30.21
1801	30.21
1802	30.21
1803	30.21
1804	30.21
1805	30.21
1806	30.21
1807	30.21
1808	30.21
1809	30.21
1810	30.21
1811	30.21
1812	30.21
1813	30.21
1814	30.21
1815	30.21
1816	30.21
1817	30.21
1818	30.21
1819	30.21
1820	30.21
1821	30.21
1822	30.21
1823	30.21
1824	30.21
1825	30.21
1826	30.21
1827	30.21
1828	30.21
1829	30.21
1830	30.21
1831	30.21
1832	30.21
1833	30.21
1834	30.21
1835	30.21
1836	30.21
1837	30.21
1838	30.21
1839	30.21
1840	30.21
1841	30.21
1842	30.21
1843	30.21
1844	30.21
1845	30.21
1846	30.21
1847	30.21
1848	30.21
1849	30.21
1850	30.21
1851	30.21
1852	30.21
1853	30.21
1854	30.21
1855	30.21
1856	30.21
1857	30.21
1858	30.21
1859	30.21
1860	30.21
1861	30.21
1862	30.21
1863	30.21
1864	30.21
1865	30.21
1866	30.21
1867	30.21
1868	30.21
1869	30.21
1870	30.21
1871	30.22
1872	30.23
1873	30.24
1874	30.25
1875	30.26
1876	30.27
1877	30.28
1878	30.29
1879	30.3
1880	30.31
1881	30.32
1882	30.33
1883	30.34
1884	30.35
1885	30.35
1886	30.36
1887	30.37
1888	30.37
1889	30.38
1890	30.81
1891	31.23
1892	31.65
1893	32.08
1894	32.5
1895	32.91
1896	33.34
1897	33.76
1898	34.19
1899	34.61
1900	35.03
1901	35.09
1902	35.14
1903	35.19
1904	35.24
1905	35.29
1906	35.34
1907	35.4
1908	35.45
1909	35.5
1910	35.55
1911	35.56
1912	35.57
1913	35.59
1914	35.6
1915	35.61
1916	35.62
1917	35.63
1918	31.51
1919	35.65
1920	35.66
1921	36.4
1922	37.13
1923	37.86
1924	38.6
1925	39.33
1926	40.07
1927	40.8
1928	41.54
1929	42.28
1930	43.01
1931	43.51
1932	44
1933	44.49
1934	44.99
1935	45.48
1936	45.98
1937	46.47
1938	46.97
1939	47.46
1940	47.96
1941	48.91
1942	49.87
1943	50.83
1944	51.79
1945	52.75
1946	53.71
1947	54.67
1948	55.63
1949	56.59
1950	57.55
1951	57.87
1952	58.47
1953	59.09
1954	59.69
1955	60.31
1956	60.92
1957	61.54
1958	62.15
1959	62.77
1960	63.38
1961	63.99
1962	64.59
1963	65.17
1964	65.75
1965	66.31
1966	66.85
1967	67.39
1968	67.91
1969	68.42
1970	68.94
1971	69.48
1972	70.04
1973	70.64
1974	71.22
1975	71.83
1976	72.44
1977	73.06
1978	73.62
1979	74.13
1980	74.6
1981	74.97
1982	75.28
1983	75.54
1984	75.75
1985	75.93
1986	76.1
1987	76.26
1988	76.35
1989	76.47
1990	76.57
1991	76.58
1992	76.72
1993	76.82
1994	76.91
1995	77.02
1996	77.11
1997	77.29
1998	77.53
1999	77.77
2000	78
2001	78.26
2002	78.52
2003	78.78
2004	79.08
2005	79.35
2006	79.62
2007	79.95
2008	80.15
2009	80.31
2010	80.4
2011	80.53
2012	80.6
2013	80.7
2014	80.8
2015	80.92
2016	81.02
2017	81.22
2018	81.42