Year	per person
1800	1.54
1820	1.54
1821	1.472
1822	1.48
1823	1.474
1824	1.438
1825	1.481
1826	1.492
1827	1.499
1828	1.487
1829	1.496
1830	1.473
1831	1.471
1832	1.49
1833	1.484
1834	1.516
1835	1.55
1836	1.538
1837	1.575
1838	1.582
1839	1.584
1840	1.666
1841	1.669
1842	1.688
1843	1.721
1844	1.727
1845	1.76
1846	1.8
1847	1.82
1848	1.875
1849	1.987
1850	2.068
1851	2.103
1852	2.144
1853	2.076
1854	2.115
1855	2.19
1856	2.194
1857	2.243
1858	2.319
1859	2.371
1860	2.427
1861	2.404
1862	2.372
1863	2.438
1864	2.541
1865	2.602
1866	2.631
1867	2.503
1868	2.601
1869	2.833
1870	2.864
1871	2.827
1872	2.993
1873	3.144
1874	2.968
1875	3.165
1876	3.085
1877	2.941
1878	3.073
1879	3.488
1880	3.862
1881	3.94
1882	4.206
1883	4.171
1884	4.148
1885	3.968
1886	4.077
1887	4.302
1888	4.076
1889	4.124
1890	4.364
1891	4.658
1892	4.505
1893	4.668
1894	4.532
1895	4.789
1896	4.756
1897	4.593
1898	5.087
1899	5.058
1900	4.869
1901	4.933
1902	5.088
1903	4.747
1904	5.077
1905	5.014
1906	5.345
1907	5.565
1908	6.087
1909	6.049
1910	6.659
1911	6.406
1912	6.587
1913	6.632
1914	5.542
1915	5.302
1916	6.426
1917	6.488
1918	6.494
1919	5.505
1920	6.144
1921	5.26
1922	5.384
1923	6.402
1924	6.795
1925	6.997
1926	6.326
1927	6.125
1928	7.396
1929	7.669
1930	6.345
1931	4.922
1932	4.094
1933	4.963
1934	5.894
1935	6.128
1936	6.32
1937	7.061
1938	7.015
1939	7.034
1940	7.183
1941	6.971
1942	7.159
1943	7.227
1944	7.226
1945	7.705
1946	8.21
1947	7.191
1948	8.238
1949	7.921
1950	8.145
1951	8.281
1952	8.64
1953	9.127
1954	8.672
1955	8.823
1956	8.782
1957	9.464
1958	9.747
1959	8.971
1960	9.478
1961	9.691
1962	9.91
1963	10.3
1964	10.29
1965	10.16
1966	11.06
1967	11.2
1968	11.38
1969	11.59
1970	11.61
1971	12.42
1972	12.05
1973	11.17
1974	11.08
1975	9.484
1976	9.648
1977	10.43
1978	11.12
1979	11.86
1980	12.61
1981	13.17
1982	11.17
1983	10.68
1984	11.12
1985	11.16
1986	11.6
1987	12.16
1988	12.83
1989	13.95
1990	14.21
1991	15.08
1992	16.66
1993	17.55
1994	18.64
1995	19.92
1996	21.1
1997	22.19
1998	22.61
1999	22.16
2000	22.88
2001	23.39
2002	23.64
2003	24.3
2004	25.55
2005	26.89
2006	27.8
2007	28.78
2008	29.55
2009	28.7