Year	per person
1971	117.6
1972	125.9
1973	129.6
1974	133.8
1975	141.1
1976	148.7
1977	165.8
1978	183
1979	203.4
1980	219.4
1981	210.3
1982	227.7
1983	237.2
1984	249
1985	266.2
1986	285.3
1987	284.4
1988	296.5
1989	311.6
1990	313.6
1991	305
1992	279.9
1993	272.9
1994	303
1995	300.5
1996	306.2
1997	331
1998	343.7
1999	360.2
2000	381.4
2001	401.3
2002	435.9
2003	454.7
2004	443
2005	448.2
2006	491.5
2007	537.1
2008	528.8