Year	Years
1800	29.2
1801	29.2
1802	29.2
1803	29.2
1804	29.2
1805	29.2
1806	29.2
1807	29.2
1808	29.2
1809	29.2
1810	29.2
1811	29.2
1812	29.2
1813	29.2
1814	29.2
1815	29.2
1816	29.2
1817	29.2
1818	29.2
1819	29.2
1820	29.2
1821	29.2
1822	29.2
1823	29.2
1824	29.2
1825	29.2
1826	29.2
1827	29.2
1828	29.2
1829	29.2
1830	29.2
1831	29.2
1832	29.2
1833	29.2
1834	29.2
1835	29.2
1836	29.2
1837	29.2
1838	29.2
1839	29.2
1840	29.2
1841	29.2
1842	29.2
1843	29.2
1844	29.2
1845	29.2
1846	29.2
1847	29.2
1848	29.2
1849	29.2
1850	29.2
1851	29.2
1852	29.2
1853	29.2
1854	29.2
1855	29.2
1856	29.2
1857	29.2
1858	29.2
1859	29.2
1860	29.2
1861	29.2
1862	29.2
1863	29.2
1864	29.2
1865	29.2
1866	29.2
1867	29.2
1868	29.2
1869	29.2
1870	29.2
1871	29.19
1872	29.19
1873	29.18
1874	29.17
1875	29.16
1876	29.16
1877	29.15
1878	29.14
1879	29.14
1880	29.13
1881	29.12
1882	29.11
1883	29.11
1884	29.1
1885	29.09
1886	29.09
1887	29.08
1888	29.07
1889	29.06
1890	29.06
1891	29.05
1892	29.04
1893	29.03
1894	29.03
1895	29.02
1896	29.01
1897	29.01
1898	29
1899	28.99
1900	28.98
1901	28.98
1902	28.97
1903	28.96
1904	28.96
1905	28.95
1906	28.94
1907	28.93
1908	28.93
1909	28.92
1910	28.91
1911	28.91
1912	29.59
1913	30.29
1914	30.97
1915	31.66
1916	32.35
1917	33.03
1918	27.38
1919	34.41
1920	35.09
1921	35.78
1922	36.47
1923	37.15
1924	37.83
1925	38.52
1926	39.2
1927	39.88
1928	40.57
1929	41.25
1930	41.93
1931	42.62
1932	43.3
1933	43.98
1934	44.67
1935	45.34
1936	46.02
1937	46.71
1938	47.38
1939	48.06
1940	48.75
1941	49.42
1942	50.1
1943	50.78
1944	51.46
1945	52.14
1946	52.81
1947	53.49
1948	54.17
1949	54.84
1950	55.52
1951	55.8
1952	56.38
1953	56.96
1954	57.55
1955	58.13
1956	58.72
1957	59.31
1958	59.9
1959	60.48
1960	61.04
1961	61.59
1962	62.12
1963	62.63
1964	63.11
1965	63.56
1966	63.99
1967	64.41
1968	64.8
1969	65.19
1970	65.58
1971	66.19
1972	67.07
1973	68.1
1974	69.03
1975	69.23
1976	69.33
1977	69.17
1978	69.23
1979	69.54
1980	69.9
1981	70.22
1982	70.54
1983	71.13
1984	71.74
1985	72.25
1986	72.63
1987	72.99
1988	73.35
1989	73.46
1990	73.53
1991	73.47
1992	73.6
1993	73.82
1994	74.1
1995	74.4
1996	74.67
1997	75.12
1998	75.54
1999	75.86
2000	76
2001	76.26
2002	76.49
2003	76.65
2004	76.75
2005	76.79
2006	76.77
2007	76.77
2008	76.87
2009	76.93
2010	77.08
2011	76.97
2012	76.89
2013	76.92
2014	76.89
2015	76.93
2016	77.02
2017	77.19
2018	77.36