Year	Years
1800	28.7
1801	28.7
1802	28.7
1803	28.7
1804	28.7
1805	28.7
1806	28.7
1807	28.7
1808	28.7
1809	28.7
1810	28.7
1811	28.7
1812	28.7
1813	28.7
1814	28.7
1815	28.7
1816	28.7
1817	28.7
1818	28.7
1819	28.7
1820	28.7
1821	28.7
1822	28.7
1823	28.7
1824	28.7
1825	28.7
1826	28.7
1827	28.7
1828	28.7
1829	31.05
1830	33.41
1831	35.76
1832	31.27
1833	35.22
1834	32.67
1835	27.2
1836	31.6
1837	26.24
1838	31.85
1839	24.84
1840	32.53
1841	23.01
1842	22.41
1843	28.3
1844	15
1845	24.47
1846	29.99
1847	33.21
1848	36.19
1849	31.72
1850	31.13
1851	36.13
1852	34.46
1853	32.86
1854	7.5
1855	29.72
1856	17.55
1857	36.58
1858	34.44
1859	31.68
1860	30.96
1861	31.24
1862	22.66
1863	27.53
1864	27.94
1865	28.38
1866	29.39
1867	4
1868	13.65
1869	26.45
1870	39.29
1871	36.88
1872	35.45
1873	28.73
1874	32.48
1875	37.49
1876	34.77
1877	32.53
1878	34.95
1879	30.17
1880	33.99
1881	32.48
1882	27.87
1883	27.27
1884	31.39
1885	28.94
1886	33.12
1887	27.9
1888	31.53
1889	28.22
1890	27.95
1891	35.1
1892	27.77
1893	22.97
1894	33.02
1895	25.72
1896	21.93
1897	32.2
1898	30.13
1899	26.95
1900	25.99
1901	23.6
1902	28.41
1903	23.58
1904	30.06
1905	23.07
1906	23.42
1907	27.61
1908	23.25
1909	25.74
1910	28.49
1911	29.27
1912	24.73
1913	27.38
1914	30.03
1915	28.01
1916	32.05
1917	30.17
1918	29.01
1919	11.78
1920	30.6
1921	23.42
1922	27.86
1923	33.34
1924	34.14
1925	38.01
1926	36.65
1927	36.87
1928	33.57
1929	31.14
1930	27.03
1931	24.18
1932	29.21
1933	34.43
1934	36.1
1935	35.24
1936	35.33
1937	32.86
1938	31.78
1939	33.64
1940	36.24
1941	36.12
1942	32.41
1943	35.76
1944	34.48
1945	26.32
1946	32.07
1947	37.49
1948	40.53
1949	43.58
1950	46.62
1951	47.11
1952	48.1
1953	49.11
1954	50.17
1955	51.25
1956	52.36
1957	53.49
1958	54.62
1959	55.73
1960	56.78
1961	57.74
1962	58.58
1963	59.27
1964	59.82
1965	60.21
1966	60.46
1967	60.6
1968	60.7
1969	60.76
1970	60.82
1971	61.29
1972	61.85
1973	62.33
1974	62.69
1975	62.92
1976	63.38
1977	63.97
1978	64.69
1979	65.42
1980	66.02
1981	66.55
1982	67.05
1983	67.27
1984	67.38
1985	67.69
1986	68.03
1987	68.4
1988	68.71
1989	69.08
1990	69.4
1991	69.66
1992	69.84
1993	69.97
1994	70.16
1995	70.4
1996	70.64
1997	70.86
1998	71.11
1999	71.32
2000	71.47
2001	71.69
2002	71.8
2003	71.95
2004	72.18
2005	72.39
2006	72.54
2007	72.75
2008	72.97
2009	73.2
2010	73.42
2011	73.77
2012	74.05
2013	74.19
2014	74.29
2015	74.49
2016	74.61
2017	74.75
2018	74.89