Year	per person
1800	1.72
1820	1.72
1870	5.516
1871	5.509
1872	6.657
1873	6.579
1874	5.856
1875	4.913
1876	5.323
1877	5.369
1878	5.684
1879	4.929
1880	5.266
1881	4.885
1882	5.26
1883	6.062
1884	5.878
1885	6.498
1886	6.597
1887	5.735
1888	6.875
1889	6.109
1890	5.431
1891	5.793
1892	5.803
1893	6.164
1894	6.721
1895	6.496
1896	6.688
1897	6.307
1898	5.691
1899	5.719
1900	5.611
1901	5.649
1902	6.507
1903	6.614
1904	6.677
1905	5.904
1906	6.407
1907	6.974
1908	7.52
1909	7.478
1910	7.932
1911	7.479
1912	8.873
1913	8.372
1914	6.713
1915	6.248
1916	6.344
1917	6.873
1918	7.152
1919	7.929
1920	6.763
1921	6.958
1922	7.786
1923	8.018
1924	8.593
1925	8.063
1926	8.594
1927	9.604
1928	9.879
1929	9.731
1930	10.88
1931	8.853
1932	8.084
1933	6.957
1934	8.147
1935	8.487
1936	8.749
1937	8.757
1938	9.298
1939	9.338
1940	9.259
1941	9.314
1942	8.442
1943	8.424
1944	9.37
1945	9.519
1946	10.33
1947	10.91
1948	11.14
1949	11.39
1950	11.79
1951	12.53
1952	12.54
1953	13
1954	13.64
1955	13.54
1956	13.56
1957	13.49
1958	13.66
1959	12.29
1960	12.55
1961	12.74
1962	12.29
1963	12.19
1964	12.29
1965	12.29
1966	12.58
1967	11.94
1968	12.01
1969	12.62
1970	13.11
1971	12.98
1972	12.51
1973	12.58
1974	12.96
1975	13.71
1976	14.19
1977	14.26
1978	14.93
1979	15.77
1980	16.64
1981	16.87
1982	15.18
1983	14.2
1984	13.96
1985	14.08
1986	15.23
1987	16.34
1988	16.24
1989	16.35
1990	16.37
1991	16.73
1992	17.84
1993	18.27
1994	19.14
1995	18.63
1996	19.42
1997	20.24
1998	21.03
1999	20.32
2000	19.94
2001	19.15
2002	16.95
2003	17.22
2004	19.16
2005	20.32
2006	21.14
2007	22.66
2008	24.52
2009	25.13