Year	Years
1800	30.8
1801	30.8
1802	30.8
1803	30.8
1804	30.8
1805	30.8
1806	30.8
1807	30.8
1808	30.8
1809	30.8
1810	30.8
1811	30.8
1812	30.8
1813	30.8
1814	30.8
1815	30.8
1816	30.8
1817	30.8
1818	30.8
1819	30.8
1820	30.8
1821	30.8
1822	30.8
1823	30.8
1824	30.8
1825	30.8
1826	30.8
1827	30.8
1828	30.8
1829	30.8
1830	30.8
1831	30.8
1832	30.8
1833	30.8
1834	30.8
1835	30.8
1836	30.8
1837	30.8
1838	30.8
1839	30.8
1840	30.8
1841	30.8
1842	30.8
1843	30.8
1844	30.8
1845	30.8
1846	30.8
1847	30.8
1848	30.8
1849	30.8
1850	30.8
1851	30.8
1852	30.8
1853	30.8
1854	30.8
1855	30.8
1856	30.8
1857	30.8
1858	30.8
1859	30.8
1860	30.8
1861	30.8
1862	30.8
1863	30.8
1864	30.8
1865	30.8
1866	30.8
1867	30.8
1868	30.8
1869	30.8
1870	30.8
1871	30.86
1872	30.92
1873	30.99
1874	31.05
1875	31.11
1876	31.17
1877	31.23
1878	31.3
1879	31.36
1880	31.42
1881	31.48
1882	31.54
1883	31.61
1884	31.67
1885	31.73
1886	31.79
1887	31.85
1888	31.92
1889	31.98
1890	32.04
1891	32.1
1892	32.16
1893	32.23
1894	32.29
1895	32.35
1896	32.41
1897	32.47
1898	32.54
1899	32.6
1900	32.66
1901	32.72
1902	32.78
1903	32.85
1904	32.91
1905	32.97
1906	33.03
1907	33.09
1908	33.16
1909	33.22
1910	33.28
1911	33.34
1912	33.4
1913	33.47
1914	33.53
1915	33.59
1916	33.65
1917	33.71
1918	13.06
1919	33.84
1920	33.9
1921	33.96
1922	34.03
1923	34.09
1924	34.15
1925	34.21
1926	34.27
1927	34.34
1928	34.4
1929	34.46
1930	34.52
1931	34.58
1932	34.65
1933	34.71
1934	34.77
1935	34.83
1936	34.89
1937	34.96
1938	35.02
1939	35.08
1940	35.14
1941	35.2
1942	35.27
1943	35.33
1944	35.39
1945	35.45
1946	36.46
1947	37.46
1948	38.47
1949	39.48
1950	40.5
1951	40.59
1952	40.71
1953	40.84
1954	40.98
1955	41.12
1956	41.28
1957	41.45
1958	41.61
1959	41.79
1960	41.97
1961	42.14
1962	42.29
1963	42.44
1964	42.59
1965	42.73
1966	42.88
1967	43.02
1968	43.19
1969	43.39
1970	43.61
1971	43.19
1972	43.66
1973	43.46
1974	43.38
1975	43.24
1976	43.15
1977	43.14
1978	43.19
1979	43.47
1980	43.88
1981	43.69
1982	44.22
1983	44.37
1984	44.36
1985	44.68
1986	44.8
1987	45.34
1988	45.92
1989	46.54
1990	47.13
1991	47.71
1992	48
1993	48.34
1994	48.84
1995	49
1996	49.85
1997	50.45
1998	51.04
1999	51.65
2000	52.18
2001	52.7
2002	53.49
2003	54.15
2004	54.9
2005	55.6
2006	56.21
2007	56.88
2008	57.57
2009	58.13
2010	58.78
2011	59.29
2012	59.79
2013	60.31
2014	60.81
2015	61.23
2016	61.71
2017	62.09
2018	62.45