Year	per person
1800	2.399
1820	2.449
1870	4.816
1890	6.446
1900	7.32
1910	8.587
1913	9.007
1926	6.505
1927	6.421
1928	6.335
1929	5.962
1930	6.305
1931	6.357
1932	5.921
1933	6.127
1934	6.115
1935	6.188
1936	6.178
1937	5.848
1938	6.425
1948	4.223
1950	6.114
1951	6.496
1952	6.896
1953	7.3
1954	7.739
1955	8.163
1956	8.398
1957	8.648
1958	8.916
1959	9.223
1960	9.538
1961	10.09
1962	10.38
1963	11.05
1964	11.68
1965	12.34
1966	13.67
1967	14.19
1968	14.17
1969	14.61
1970	14.76
1971	16.66
1972	17.57
1973	17.99
1974	18.81
1975	19.46
1976	20.26
1977	20.52
1978	21.02
1979	21.46
1980	21.39
1981	21.14
1982	21.06
1983	20.83
1984	21.61
1985	21.51
1986	21.8
1987	21.26
1988	21.13
1989	20.39
1990	18.16
1991	15.85
1992	14.47
1993	14.71
1994	15.3
1995	16.42
1996	17.11
1997	16.11
1998	15.37
1999	15.21
2000	15.55
2001	16.45
2002	17.29
2003	18.16
2004	19.72
2005	20.56
2006	22.26
2007	23.74
2008	25.57
2009	23.83