Year	Years
1800	29.1
1801	29.1
1802	29.1
1803	29.1
1804	29.1
1805	29.1
1806	29.1
1807	29.1
1808	29.1
1809	29.1
1810	29.1
1811	29.1
1812	29.1
1813	29.1
1814	29.1
1815	29.1
1816	29.1
1817	29.1
1818	29.1
1819	29.1
1820	30.08
1821	31.06
1822	32.04
1823	33.02
1824	34
1825	34
1826	34
1827	34
1828	34
1829	34
1830	34
1831	34
1832	34
1833	34
1834	34
1835	34
1836	34
1837	34
1838	34
1839	34
1840	34
1841	34
1842	34
1843	34
1844	34
1845	34
1846	34
1847	34
1848	34
1849	34
1850	34
1851	34
1852	34
1853	34
1854	34
1855	34
1856	34
1857	34
1858	34
1859	34
1860	34
1861	34
1862	34
1863	34
1864	34
1865	34
1866	34
1867	34
1868	34
1869	34
1870	34
1871	34
1872	34.01
1873	34.01
1874	34.01
1875	34.01
1876	34.02
1877	34.02
1878	34.02
1879	34.03
1880	34.03
1881	34.03
1882	34.04
1883	34.04
1884	34.04
1885	34.04
1886	34.05
1887	34.05
1888	34.05
1889	34.06
1890	34.06
1891	34.06
1892	34.06
1893	34.07
1894	34.07
1895	34.07
1896	34.08
1897	34.08
1898	34.08
1899	34.09
1900	34.09
1901	34.09
1902	34.09
1903	34.1
1904	34.1
1905	34.1
1906	34.11
1907	34.11
1908	34.11
1909	34.11
1910	34.12
1911	34.12
1912	34.12
1913	34.13
1914	34.13
1915	34.13
1916	34.14
1917	34.14
1918	21.88
1919	34.14
1920	34.15
1921	34.96
1922	35.79
1923	36.61
1924	37.42
1925	38.24
1926	39.07
1927	39.89
1928	40.7
1929	41.53
1930	42.35
1931	43.17
1932	43.99
1933	44.81
1934	45.63
1935	46.45
1936	47.28
1937	48.1
1938	48.92
1939	49.75
1940	50.56
1941	49.3
1942	35.32
1943	37.03
1944	36.33
1945	35.13
1946	44.29
1947	53.35
1948	56.38
1949	57.79
1950	58.79
1951	59.28
1952	60.24
1953	61.15
1954	62.01
1955	62.81
1956	63.57
1957	64.26
1958	64.91
1959	65.48
1960	65.99
1961	66.41
1962	66.76
1963	67.03
1964	67.25
1965	67.43
1966	67.62
1967	67.81
1968	68.05
1969	68.34
1970	68.68
1971	68.94
1972	69.15
1973	69.45
1974	69.9
1975	70.39
1976	70.65
1977	70.95
1978	71.19
1979	71.36
1980	71.58
1981	71.82
1982	72.04
1983	72.31
1984	72.78
1985	73.21
1986	73.68
1987	74.05
1988	74.38
1989	74.8
1990	75.48
1991	76.11
1992	76.56
1993	76.94
1994	77.18
1995	77.4
1996	77.73
1997	78.19
1998	78.55
1999	78.94
2000	79.38
2001	79.81
2002	80.14
2003	80.36
2004	80.65
2005	80.93
2006	81.13
2007	81.59
2008	82.06
2009	82.39
2010	82.69
2011	82.91
2012	83.16
2013	83.24
2014	83.39
2015	83.58
2016	83.67
2017	83.85
2018	84.03