Year	Years
1800	26
1801	26
1802	26
1803	26
1804	26
1805	26
1806	26
1807	26
1808	26
1809	26
1810	26
1811	26
1812	26
1813	26
1814	26
1815	26
1816	26
1817	26
1818	26
1819	26
1820	26
1821	26
1822	26
1823	26
1824	26
1825	26
1826	26
1827	26
1828	26
1829	26
1830	26
1831	26
1832	26
1833	26
1834	26
1835	26
1836	26
1837	26
1838	26
1839	26
1840	26
1841	26
1842	26
1843	26
1844	26
1845	26
1846	26
1847	26
1848	26
1849	26
1850	26
1851	26
1852	26
1853	26
1854	26
1855	26
1856	26
1857	26
1858	26
1859	26
1860	26
1861	26
1862	26
1863	26
1864	26
1865	26
1866	26
1867	26
1868	26
1869	26
1870	26
1871	26.03
1872	26.07
1873	26.1
1874	26.13
1875	26.17
1876	26.2
1877	26.23
1878	26.27
1879	26.3
1880	26.34
1881	26.37
1882	26.4
1883	26.44
1884	26.47
1885	26.5
1886	26.54
1887	26.57
1888	26.6
1889	26.64
1890	26.67
1891	26.7
1892	26.74
1893	26.77
1894	26.8
1895	26.84
1896	26.87
1897	26.91
1898	26.94
1899	26.97
1900	27.01
1901	27.04
1902	27.07
1903	27.11
1904	26.62
1905	26.13
1906	25.64
1907	25.16
1908	24.66
1909	25
1910	25.34
1911	25.68
1912	26.03
1913	26.37
1914	26.93
1915	27.49
1916	28.05
1917	28.62
1918	18.08
1919	29.23
1920	29.81
1921	30.39
1922	30.97
1923	31.55
1924	32.46
1925	33.37
1926	34.29
1927	35.2
1928	36.12
1929	36.97
1930	37.84
1931	38.69
1932	39.56
1933	40.43
1934	41.59
1935	42.77
1936	43.95
1937	45.12
1938	46.3
1939	46.99
1940	47.68
1941	48.37
1942	49.06
1943	47.05
1944	46.01
1945	46.61
1946	49.41
1947	51.67
1948	52.38
1949	52.94
1950	39.71
1951	29.82
1952	27.64
1953	35.43
1954	47.59
1955	52.15
1956	53.88
1957	55.05
1958	55.78
1959	56.64
1960	57.26
1961	57.73
1962	58.26
1963	58.92
1964	59.81
1965	60.91
1966	62.22
1967	63.58
1968	64.91
1969	66.17
1970	67.36
1971	68.02
1972	68.59
1973	69.09
1974	69.5
1975	69.82
1976	70.09
1977	70.33
1978	70.51
1979	70.68
1980	70.82
1981	70.92
1982	71.02
1983	71.11
1984	71.19
1985	71.25
1986	71.32
1987	71.31
1988	71.46
1989	71.54
1990	71.62
1991	71.68
1992	71.72
1993	71.73
1994	71.62
1995	64.08
1996	64.04
1997	63.97
1998	63.86
1999	63.75
2000	63.63
2001	63.51
2002	63.42
2003	69.75
2004	69.74
2005	69.76
2006	69.81
2007	69.82
2008	69.96
2009	70.02
2010	70.1
2011	70.19
2012	70.29
2013	70.41
2014	70.52
2015	70.64
2016	70.74
2017	70.94
2018	71.13