Year	per person
1971	169.4
1972	224.6
1973	235.2
1974	222.1
1975	246.5
1976	231.5
1977	254.4
1978	244
1979	284.5
1980	265.5
1981	269.3
1982	200.8
1983	202
1984	219.9
1985	264.6
1986	257.1
1987	278
1988	275.5
1989	241.3
1990	351.6
1991	377.3
1992	404.9
1993	381.8
1994	395.9
1995	374.2
1996	458.1
1997	454.4
1998	470.5
1999	473.9
2000	510.5
2001	333.4
2002	366.5
2003	505.5
2004	509.3
2005	466.1
2006	453.9
2007	468.3
2008	457.6