Year	Years
1800	30.3
1801	30.3
1802	30.3
1803	30.3
1804	30.3
1805	30.3
1806	30.3
1807	30.3
1808	30.3
1809	30.3
1810	30.3
1811	30.3
1812	30.3
1813	30.3
1814	30.3
1815	30.3
1816	30.3
1817	30.3
1818	30.3
1819	30.3
1820	30.3
1821	30.3
1822	30.3
1823	30.3
1824	30.3
1825	30.3
1826	30.3
1827	30.3
1828	30.3
1829	30.3
1830	30.3
1831	30.3
1832	30.3
1833	30.3
1834	30.3
1835	30.3
1836	30.3
1837	30.3
1838	30.3
1839	30.3
1840	30.3
1841	30.3
1842	30.3
1843	30.3
1844	30.3
1845	30.3
1846	30.3
1847	30.3
1848	30.3
1849	30.3
1850	30.3
1851	30.3
1852	30.3
1853	30.3
1854	30.3
1855	30.3
1856	30.3
1857	30.3
1858	30.3
1859	30.3
1860	30.3
1861	30.3
1862	30.3
1863	30.3
1864	30.3
1865	30.3
1866	30.3
1867	30.3
1868	30.3
1869	30.3
1870	30.3
1871	30.32
1872	30.34
1873	30.36
1874	30.39
1875	30.41
1876	30.43
1877	30.45
1878	30.47
1879	30.49
1880	30.51
1881	30.54
1882	30.56
1883	30.58
1884	30.6
1885	30.62
1886	30.64
1887	30.66
1888	30.69
1889	30.71
1890	30.73
1891	30.75
1892	30.77
1893	30.79
1894	30.81
1895	30.83
1896	30.86
1897	30.88
1898	30.9
1899	30.92
1900	30.94
1901	30.96
1902	30.98
1903	31.01
1904	31.03
1905	31.05
1906	31.07
1907	31.09
1908	31.11
1909	31.13
1910	31.16
1911	31.18
1912	31.2
1913	31.22
1914	31.24
1915	31.26
1916	31.28
1917	31.31
1918	12.12
1919	31.35
1920	31.37
1921	31.39
1922	31.41
1923	31.43
1924	31.46
1925	31.48
1926	31.5
1927	31.52
1928	31.54
1929	31.56
1930	31.58
1931	31.61
1932	31.63
1933	31.65
1934	31.67
1935	31.69
1936	31.71
1937	31.73
1938	31.76
1939	31.78
1940	31.8
1941	31.82
1942	31.84
1943	31.86
1944	31.88
1945	31.9
1946	33.13
1947	34.36
1948	35.59
1949	36.83
1950	38.06
1951	38.15
1952	38.33
1953	38.52
1954	38.73
1955	38.96
1956	39.2
1957	39.45
1958	39.72
1959	40
1960	40.27
1961	40.53
1962	40.79
1963	41.03
1964	41.28
1965	41.54
1966	41.84
1967	42.18
1968	42.58
1969	43.02
1970	43.51
1971	44.1
1972	44.73
1973	45.3
1974	45.86
1975	46.4
1976	46.92
1977	47.39
1978	48.05
1979	48.85
1980	49.37
1981	49.67
1982	49.93
1983	50.06
1984	50.16
1985	50.07
1986	49.81
1987	49.6
1988	49.36
1989	48.96
1990	48.72
1991	48.35
1992	47.86
1993	47.31
1994	46.56
1995	46.01
1996	45.43
1997	45.02
1998	44.57
1999	44.42
2000	44.73
2001	45.15
2002	45.55
2003	46.21
2004	46.82
2005	47.62
2006	48.47
2007	49.49
2008	50.6
2009	51.84
2010	53.07
2011	54.53
2012	56.12
2013	57.5
2014	58.52
2015	59.44
2016	60.25
2017	60.67
2018	61.03