Year	per person
1971	162.1
1972	186.3
1973	203.2
1974	201.1
1975	206.6
1976	219.6
1977	219.1
1978	220.6
1979	232.4
1980	233.6
1981	238
1982	245.1
1983	254.2
1984	246.2
1985	258.8
1986	274.8
1987	294.2
1988	285
1989	262
1990	266.5
1991	276.1
1992	288.2
1993	296.3
1994	305.9
1995	322.6
1996	322
1997	342.7
1998	360.5
1999	367.2
2000	387
2001	394.8
2002	421.7
2003	441.2
2004	465.5
2005	476.5
2006	480.8
2007	492.4
2008	500.3