Year	per person
1971	29.41
1972	34.6
1973	45.41
1974	49.13
1975	57.44
1976	66.66
1977	79.85
1978	105.7
1979	132.7
1980	139.5
1981	153.3
1982	167.8
1983	194
1984	216.8
1985	236.1
1986	249.9
1987	275.4
1988	314.4
1989	357.6
1990	413.8
1991	449.8
1992	497.7
1993	540
1994	593.1
1995	625.4
1996	670.2
1997	704.3
1998	706.6
1999	736.3
2000	783.7
2001	822.2
2002	881.5
2003	924.9
2004	1004
2005	1046
2006	1076
2007	1105
2008	1142