Year	per person
1800	1.361
1820	1.361
1913	2.511
1950	3.575
1960	4.994
1961	5.144
1962	5.266
1963	4.879
1964	5.004
1965	4.995
1966	4.944
1967	4.429
1968	4.67
1969	4.755
1970	5.212
1971	5.309
1972	6.607
1973	5.808
1974	5.237
1975	4.787
1976	5.228
1977	5.321
1978	5.895
1979	6.035
1980	6.103
1981	6.426
1982	6.684
1983	6.929
1984	7.282
1985	7.664
1986	8.101
1987	8.386
1988	9.516
1989	9.66
1990	10.06
1991	10.04
1992	10.72
1993	10.67
1994	10.29
1995	10.34
1996	10.42
1997	11.74
1998	12.29
1999	12.76
2000	12.92
2001	12.94
2002	13.39
2003	13.74
2004	14.51
2005	14.81
2006	15.92
2007	17.18
2008	17.06
2009	16.62