Year	Years
1800	33.97
1801	36.37
1802	34.38
1803	30.64
1804	29.38
1805	34.88
1806	35
1807	34.2
1808	34.5
1809	35
1810	37.4
1811	36.1
1812	31.7
1813	31.2
1814	30.1
1815	36.5
1816	40.04
1817	39.18
1818	38.53
1819	37.25
1820	39.21
1821	39.83
1822	38.3
1823	39.97
1824	39.14
1825	38.53
1826	37.76
1827	39.35
1828	37.53
1829	39.36
1830	39.56
1831	39.65
1832	35.81
1833	38.83
1834	35.01
1835	39.48
1836	41.95
1837	39.38
1838	39.33
1839	40.91
1840	40.37
1841	40.68
1842	40.01
1843	40.75
1844	42.29
1845	43.58
1846	40.67
1847	40.41
1848	40.29
1849	35.91
1850	43.28
1851	41.77
1852	41.32
1853	42.52
1854	36.13
1855	37.54
1856	40.18
1857	39.59
1858	39.67
1859	35.26
1860	43.33
1861	40.45
1862	42.7
1863	41.73
1864	42.01
1865	40.16
1866	41.83
1867	42.33
1868	40.23
1869	41.14
1870	36.41
1871	29.59
1872	42.64
1873	41.76
1874	44.31
1875	43.18
1876	43.56
1877	44.34
1878	43.37
1879	44.01
1880	42.75
1881	43.57
1882	43.18
1883	43.3
1884	42.55
1885	44
1886	43.2
1887	43.78
1888	44.18
1889	45.6
1890	43.4
1891	44.15
1892	43.61
1893	43.64
1894	45.58
1895	45.25
1896	47.61
1897	47.98
1898	46.04
1899	45.29
1900	45.14
1901	47.07
1902	48.08
1903	48.5
1904	48.15
1905	48.43
1906	47.81
1907	48.36
1908	49.38
1909	50.09
1910	51.46
1911	48.25
1912	51.71
1913	51.44
1914	37.92
1915	35.7
1916	39.59
1917	42.68
1918	34.41
1919	47.62
1920	51.71
1921	52.8
1922	55.04
1923	54.77
1924	55.4
1925	54.52
1926	54.16
1927	55.93
1928	55.58
1929	54.41
1930	57.01
1931	57.08
1932	57.41
1933	57.85
1934	58.52
1935	58.48
1936	58.97
1937	59.34
1938	59.14
1939	59.79
1940	49.6
1941	57.84
1942	57.62
1943	53.49
1944	47.34
1945	55.13
1946	62.58
1947	64.19
1948	66.05
1949	65.14
1950	66.61
1951	66.35
1952	67.64
1953	67.58
1954	68.45
1955	68.72
1956	68.75
1957	69.18
1958	70.42
1959	70.45
1960	70.67
1961	71.25
1962	70.78
1963	70.64
1964	71.6
1965	71.44
1966	71.85
1967	71.84
1968	71.84
1969	71.57
1970	72.47
1971	72.64
1972	72.85
1973	73.05
1974	73.22
1975	73.23
1976	73.54
1977	73.86
1978	74.13
1979	74.41
1980	74.59
1981	74.79
1982	75.04
1983	75.26
1984	75.59
1985	75.84
1986	76.08
1987	76.43
1988	76.69
1989	76.93
1990	77.16
1991	77.34
1992	77.56
1993	77.73
1994	77.94
1995	78.12
1996	78.32
1997	78.63
1998	78.74
1999	78.89
2000	79.09
2001	79.31
2002	79.54
2003	79.72
2004	80.09
2005	80.34
2006	80.6
2007	80.84
2008	81.02
2009	81.22
2010	81.42
2011	81.65
2012	81.77
2013	81.95
2014	82.16
2015	82.22
2016	82.29
2017	82.46
2018	82.62