Year	per person
1971	93.94
1972	98.51
1973	105.8
1974	113.3
1975	121.4
1976	133.4
1977	149.9
1978	161.8
1979	175.1
1980	189.2
1981	199
1982	210
1983	225.5
1984	229.8
1985	237.7
1986	255.2
1987	268.5
1988	278.1
1989	294.4
1990	322.2
1991	332.5
1992	332.6
1993	338.5
1994	347.6
1995	388.8
1996	415.9
1997	439.5
1998	464.4
1999	469.2
2000	475.7
2001	415.1
2002	404.4
2003	418.4
2004	426.9
2005	447.1
2006	456.3
2007	478.4
2008	498.2