Year	Years
1800	25.8
1801	25.8
1802	25.8
1803	25.8
1804	25.8
1805	25.8
1806	25.8
1807	25.8
1808	25.8
1809	25.8
1810	25.8
1811	25.8
1812	25.8
1813	25.8
1814	25.8
1815	25.8
1816	25.8
1817	25.8
1818	25.8
1819	25.8
1820	25.8
1821	25.8
1822	25.8
1823	25.8
1824	25.8
1825	25.8
1826	25.8
1827	25.8
1828	25.8
1829	25.8
1830	25.8
1831	25.8
1832	25.81
1833	25.81
1834	25.81
1835	25.81
1836	25.81
1837	25.81
1838	25.81
1839	25.81
1840	25.81
1841	25.81
1842	25.81
1843	25.81
1844	25.81
1845	25.81
1846	25.81
1847	25.81
1848	25.81
1849	25.81
1850	25.81
1851	25.81
1852	25.81
1853	25.81
1854	25.81
1855	25.81
1856	25.81
1857	25.81
1858	25.81
1859	25.81
1860	25.81
1861	25.81
1862	25.81
1863	25.81
1864	25.81
1865	25.81
1866	25.81
1867	25.81
1868	25.81
1869	25.81
1870	25.81
1871	25.8
1872	25.8
1873	25.79
1874	25.79
1875	25.78
1876	25.77
1877	25.77
1878	25.76
1879	25.76
1880	25.75
1881	25.74
1882	25.74
1883	25.73
1884	25.72
1885	25.72
1886	25.71
1887	25.71
1888	25.7
1889	25.69
1890	25.69
1891	25.68
1892	25.68
1893	25.67
1894	25.67
1895	25.67
1896	25.66
1897	25.66
1898	25.65
1899	25.64
1900	25.64
1901	25.63
1902	25.62
1903	25.62
1904	25.61
1905	25.61
1906	25.6
1907	25.59
1908	25.59
1909	25.58
1910	25.58
1911	25.57
1912	25.56
1913	25.56
1914	25.55
1915	25.55
1916	25.54
1917	25.53
1918	9.58
1919	25.52
1920	25.51
1921	25.51
1922	25.5
1923	25.5
1924	25.48
1925	25.47
1926	25.47
1927	25.46
1928	25.46
1929	25.45
1930	25.44
1931	25.43
1932	25.42
1933	25.42
1934	25.41
1935	26.15
1936	26.89
1937	27.63
1938	28.37
1939	29.11
1940	29.85
1941	30.92
1942	32.01
1943	33.08
1944	34.15
1945	35.22
1946	36.3
1947	37.38
1948	38.45
1949	39.52
1950	40.59
1951	40.72
1952	41.04
1953	41.37
1954	41.74
1955	42.14
1956	42.57
1957	43.04
1958	43.51
1959	44.03
1960	44.56
1961	45.11
1962	45.67
1963	46.24
1964	46.82
1965	47.42
1966	48.04
1967	48.7
1968	49.39
1969	50.1
1970	50.81
1971	51.97
1972	53.14
1973	54.31
1974	55.15
1975	55.83
1976	49.87
1977	57.99
1978	58.64
1979	59.09
1980	58.9
1981	58.48
1982	57.82
1983	60.57
1984	61.38
1985	62.03
1986	62.86
1987	63.65
1988	64.44
1989	64.72
1990	64.63
1991	64.68
1992	65
1993	65.51
1994	65.95
1995	66.62
1996	67.22
1997	67.59
1998	67.81
1999	68.27
2000	68.63
2001	68.92
2002	69.29
2003	69.55
2004	69.7
2005	69.8
2006	70.16
2007	70.52
2008	70.8
2009	71.04
2010	71.25
2011	71.51
2012	71.83
2013	72.1
2014	72.33
2015	72.55
2016	72.71
2017	72.96
2018	73.2