Year	per person
1971	33.03
1972	39.79
1973	45.2
1974	49.99
1975	60.95
1976	76.22
1977	91.28
1978	103.6
1979	123.8
1980	138.4
1981	140.6
1982	170.7
1983	197.6
1984	216
1985	233.7
1986	247
1987	263.5
1988	262.5
1989	287.9
1990	304.1
1991	323.6
1992	323.1
1993	364.8
1994	369.2
1995	379.3
1996	384.3
1997	418.9
1998	447.2
1999	458.4
2000	476.3
2001	495.2
2002	522.4
2003	565.5
2004	601
2005	649.9
2006	700.2
2007	731.2
2008	753.2