Year	per person
1971	122.8
1972	139.7
1973	152.9
1974	154.9
1975	175
1976	198.4
1977	221.7
1978	246.3
1979	244.5
1980	221
1981	230.6
1982	225.9
1983	222.9
1984	213.1
1985	213.8
1986	220.9
1987	211.9
1988	196.9
1989	188
1990	234.2
1991	295.6
1992	333.3
1993	308.5
1994	292.3
1995	313.6
1996	359
1997	352.2
1998	351.7
1999	350.7
2000	340.9
2001	344.5
2002	346.9
2003	368.4
2004	359.8
2005	413.6
2006	448.4
2007	466.5
2008	467.6