Year	per person
1800	1.997
1820	1.997
1913	3.685
1950	6.367
1960	4.819
1961	4.905
1962	4.831
1963	4.133
1964	4.494
1965	4.854
1966	4.995
1967	5.099
1968	5.05
1969	5.311
1970	5.46
1971	5.572
1972	5.349
1973	5.387
1974	5.772
1975	6.224
1976	6.272
1977	6.054
1978	5.895
1979	5.746
1980	5.82
1981	5.896
1982	5.119
1983	4.782
1984	4.559
1985	4.692
1986	4.679
1987	4.757
1988	4.616
1989	4.415
1990	4.296
1991	4.555
1992	4.901
1993	5.283
1994	5.713
1995	5.985
1996	6.456
1997	6.868
1998	6.766
1999	6.98
2000	6.889
2001	7.039
2002	7.101
2003	7.014
2004	7.233
2005	7.088
2006	7.426
2007	7.924
2008	8.042
2009	8.283