Year	Years
1800	28.7
1801	28.7
1802	28.7
1803	28.7
1804	28.7
1805	28.7
1806	28.7
1807	28.7
1808	28.7
1809	28.7
1810	28.7
1811	28.7
1812	28.7
1813	28.7
1814	28.7
1815	28.7
1816	28.7
1817	28.7
1818	28.7
1819	28.7
1820	28.7
1821	28.7
1822	28.7
1823	28.7
1824	28.7
1825	28.7
1826	28.7
1827	28.7
1828	28.7
1829	28.7
1830	28.7
1831	28.7
1832	28.7
1833	28.7
1834	28.7
1835	28.7
1836	28.7
1837	28.7
1838	28.7
1839	28.7
1840	28.7
1841	28.7
1842	28.7
1843	28.7
1844	28.7
1845	28.7
1846	28.7
1847	28.7
1848	28.7
1849	28.7
1850	28.7
1851	28.7
1852	28.7
1853	28.7
1854	28.7
1855	28.7
1856	28.7
1857	28.7
1858	28.7
1859	28.7
1860	28.7
1861	28.7
1862	28.7
1863	28.7
1864	28.7
1865	28.7
1866	28.7
1867	28.7
1868	28.7
1869	28.7
1870	28.7
1871	28.71
1872	28.72
1873	28.74
1874	28.75
1875	28.76
1876	28.77
1877	28.78
1878	28.8
1879	28.81
1880	28.82
1881	28.83
1882	28.84
1883	28.86
1884	28.87
1885	28.88
1886	28.89
1887	28.9
1888	28.91
1889	28.93
1890	28.94
1891	28.95
1892	28.96
1893	28.97
1894	28.99
1895	29
1896	29.01
1897	29.02
1898	29.03
1899	29.05
1900	29.06
1901	29.07
1902	29.08
1903	29.09
1904	29.11
1905	29.12
1906	29.13
1907	29.14
1908	29.15
1909	29.17
1910	29.18
1911	29.19
1912	29.2
1913	29.21
1914	29.22
1915	29.24
1916	29.25
1917	29.26
1918	25.88
1919	29.28
1920	29.3
1921	29.31
1922	29.32
1923	29.33
1924	29.34
1925	29.36
1926	29.37
1927	29.38
1928	29.39
1929	29.4
1930	29.42
1931	30.18
1932	30.94
1933	31.69
1934	32.45
1935	33.21
1936	33.98
1937	34.74
1938	35.5
1939	36.26
1940	37.03
1941	37.79
1942	38.56
1943	39.32
1944	40.09
1945	40.85
1946	41.62
1947	42.39
1948	43.15
1949	43.93
1950	44.7
1951	45.19
1952	46.15
1953	47.09
1954	48.02
1955	48.93
1956	49.83
1957	50.71
1958	51.57
1959	52.41
1960	53.22
1961	53.99
1962	54.72
1963	55.42
1964	56.06
1965	56.65
1966	57.19
1967	57.67
1968	58.11
1969	58.51
1970	58.85
1971	59.45
1972	59.85
1973	60.67
1974	61.28
1975	61.87
1976	62.52
1977	63.14
1978	63.7
1979	64.2
1980	64.81
1981	58.66
1982	62.44
1983	61.07
1984	63
1985	64.62
1986	64.57
1987	66.06
1988	67.44
1989	65.86
1990	68.17
1991	68.48
1992	69.18
1993	69.53
1994	69.83
1995	70.26
1996	70.61
1997	71.07
1998	71.31
1999	71.87
2000	72.19
2001	71.93
2002	72.65
2003	72.76
2004	72.91
2005	73.07
2006	73.34
2007	73.53
2008	73.77
2009	73.83
2010	74.11
2011	74.35
2012	74.51
2013	74.61
2014	74.83
2015	75.04
2016	75.27
2017	75.51
2018	75.75