Year	per person
1800	2.219
1820	2.219
1913	2.999
1970	5.095
1971	5.155
1972	5.152
1973	6.83
1974	7.798
1975	7.728
1976	7.688
1977	7.808
1978	8.177
1979	8.27
1980	7.592
1981	6.966
1982	5.539
1983	5.436
1984	5.744
1985	5.539
1986	5.412
1987	5.843
1988	6.336
1989	6.108
1990	6.95
1991	7.119
1992	7.255
1993	7.501
1994	8.219
1995	7.755
1996	7.774
1997	8.507
1998	9.327
1999	9.48
2000	8.208
2001	9.236
2002	9.696
2003	10.18
2004	10.54
2005	10.92
2006	10.98
2007	11.15
2008	11.33