Year	per person
1971	27
1972	29.54
1973	33.63
1974	36.74
1975	39.35
1976	45.4
1977	48.69
1978	55.08
1979	59.75
1980	56.43
1981	59.83
1982	74.19
1983	79.46
1984	95.61
1985	104.4
1986	168.7
1987	180.4
1988	192.7
1989	213.5
1990	241.4
1991	250
1992	270.7
1993	264.8
1994	276.5
1995	283.7
1996	295.1
1997	293.8
1998	324.8
1999	352.8
2000	372.7
2001	390.1
2002	409.8
2003	451.5
2004	465.5
2005	532.7
2006	504.2
2007	531.6
2008	590.5