Year	Years
1800	30.28
1801	30.28
1802	30.28
1803	30.28
1804	30.28
1805	30.28
1806	30.28
1807	30.28
1808	30.28
1809	30.28
1810	30.28
1811	30.28
1812	30.28
1813	30.28
1814	30.28
1815	30.28
1816	30.28
1817	30.28
1818	30.28
1819	30.28
1820	30.28
1821	30.28
1822	30.28
1823	30.28
1824	30.28
1825	30.28
1826	30.28
1827	30.28
1828	30.28
1829	30.28
1830	30.28
1831	30.28
1832	30.28
1833	30.28
1834	30.28
1835	30.28
1836	30.28
1837	30.28
1838	30.28
1839	30.28
1840	30.28
1841	30.28
1842	30.28
1843	30.28
1844	30.28
1845	30.28
1846	30.28
1847	30.28
1848	30.28
1849	30.28
1850	30.28
1851	30.28
1852	30.28
1853	30.28
1854	30.28
1855	30.28
1856	30.28
1857	30.28
1858	30.28
1859	30.28
1860	30.28
1861	30.28
1862	30.28
1863	30.28
1864	30.28
1865	30.28
1866	30.28
1867	30.28
1868	30.28
1869	30.28
1870	30.28
1871	30.34
1872	30.41
1873	30.47
1874	30.54
1875	30.6
1876	30.66
1877	30.73
1878	30.79
1879	30.86
1880	30.92
1881	30.99
1882	31.05
1883	31.11
1884	31.18
1885	31.24
1886	31.31
1887	31.37
1888	31.43
1889	31.5
1890	31.56
1891	31.63
1892	31.69
1893	31.75
1894	31.82
1895	31.88
1896	31.95
1897	32.01
1898	32.07
1899	32.14
1900	32.2
1901	32.27
1902	32.33
1903	32.4
1904	32.46
1905	32.52
1906	32.59
1907	32.65
1908	32.72
1909	32.78
1910	32.84
1911	32.91
1912	32.97
1913	33.04
1914	33.1
1915	33.16
1916	33.23
1917	33.29
1918	12.9
1919	33.42
1920	33.49
1921	33.55
1922	33.61
1923	33.68
1924	33.74
1925	33.81
1926	33.87
1927	33.93
1928	34
1929	34.06
1930	34.13
1931	34.19
1932	34.25
1933	34.32
1934	34.38
1935	34.45
1936	34.51
1937	34.58
1938	34.64
1939	34.7
1940	34.77
1941	34.83
1942	34.9
1943	34.96
1944	35.02
1945	35.09
1946	35.15
1947	35.22
1948	35.28
1949	35.34
1950	35.41
1951	35.77
1952	36.42
1953	37.08
1954	37.75
1955	38.41
1956	39.08
1957	39.74
1958	40.41
1959	41.06
1960	41.7
1961	42.33
1962	42.94
1963	43.52
1964	44.09
1965	44.65
1966	45.21
1967	45.77
1968	46.34
1969	46.94
1970	47.56
1971	47.82
1972	48.12
1973	48.43
1974	48.86
1975	49.51
1976	49.69
1977	49.75
1978	49.96
1979	50.04
1980	50.26
1981	47.64
1982	47.8
1983	47.81
1984	45.2
1985	45.11
1986	47
1987	47.16
1988	50.25
1989	50.57
1990	50.66
1991	50.81
1992	50.93
1993	51.01
1994	51.21
1995	51.23
1996	51.24
1997	51.18
1998	51.32
1999	51.4
2000	51.32
2001	51.78
2002	51.84
2003	52.09
2004	52.27
2005	52.35
2006	52.61
2007	52.92
2008	53.62
2009	54.08
2010	54.48
2011	55.05
2012	55.63
2013	56.51
2014	57.9
2015	58.96
2016	59.97
2017	60.54
2018	61.07