Year	Years
1800	30
1801	30
1802	30
1803	30
1804	30
1805	30
1806	30
1807	30
1808	30
1809	30
1810	30
1811	30
1812	30
1813	30
1814	30
1815	30
1816	30
1817	30
1818	30
1819	30
1820	30
1821	30
1822	30
1823	30
1824	30
1825	30
1826	30
1827	30
1828	30
1829	30
1830	30
1831	30
1832	30
1833	30
1834	30
1835	30
1836	30
1837	30
1838	30
1839	30
1840	30
1841	30
1842	30
1843	30
1844	30
1845	30
1846	30
1847	30
1848	30
1849	30
1850	30
1851	30
1852	30
1853	30
1854	30
1855	30
1856	30
1857	30
1858	30
1859	30
1860	30
1861	30
1862	30
1863	30
1864	30
1865	30
1866	30
1867	30
1868	30
1869	30
1870	30
1871	30.01
1872	30.02
1873	30.02
1874	30.03
1875	30.04
1876	30.05
1877	30.06
1878	30.06
1879	30.07
1880	30.08
1881	30.09
1882	30.09
1883	30.1
1884	30.11
1885	30.12
1886	30.13
1887	30.13
1888	30.14
1889	30.15
1890	30.16
1891	30.17
1892	30.17
1893	30.18
1894	30.19
1895	30.2
1896	30.2
1897	30.21
1898	30.22
1899	30.23
1900	30.24
1901	30.24
1902	30.25
1903	30.26
1904	30.27
1905	30.28
1906	30.28
1907	30.29
1908	30.3
1909	30.31
1910	30.32
1911	30.32
1912	30.33
1913	30.34
1914	30.35
1915	30.35
1916	30.36
1917	30.37
1918	14.21
1919	30.39
1920	30.39
1921	30.4
1922	30.41
1923	30.42
1924	30.43
1925	30.43
1926	30.44
1927	30.45
1928	30.96
1929	31.48
1930	32
1931	32.51
1932	33.03
1933	33.55
1934	34.06
1935	34.58
1936	35.1
1937	35.62
1938	36.01
1939	36.4
1940	36.79
1941	37.18
1942	29.55
1943	28.54
1944	27.52
1945	26.51
1946	31.11
1947	31.63
1948	32.15
1949	32.66
1950	37.16
1951	37.65
1952	38.61
1953	39.56
1954	40.5
1955	41.42
1956	42.34
1957	43.24
1958	44.13
1959	45
1960	45.86
1961	46.7
1962	47.54
1963	48.36
1964	49.17
1965	44.59
1966	45.01
1967	51.53
1968	52.28
1969	53.03
1970	53.77
1971	54.25
1972	54.76
1973	55.41
1974	56.02
1975	56.49
1976	56.99
1977	57.58
1978	58.11
1979	58.69
1980	59.31
1981	59.94
1982	60.42
1983	60.9
1984	61.36
1985	61.77
1986	62.19
1987	62.4
1988	62.8
1989	63.28
1990	63.64
1991	64.1
1992	64.52
1993	64.87
1994	65.32
1995	65.76
1996	66.17
1997	66.5
1998	66.79
1999	67.01
2000	67.27
2001	67.57
2002	67.82
2003	68.07
2004	66.53
2005	68.57
2006	68.82
2007	69.09
2008	69.34
2009	69.6
2010	69.9
2011	70.22
2012	70.54
2013	70.83
2014	71.12
2015	71.4
2016	71.69
2017	71.86
2018	72.03