Year	per person
1971	48.48
1972	50.3
1973	50.36
1974	59.99
1975	72.16
1976	84.89
1977	95.32
1978	112
1979	139.8
1980	152.4
1981	173.1
1982	205.1
1983	239.2
1984	257.4
1985	265.7
1986	249.3
1987	243
1988	281.6
1989	331.6
1990	327.5
1991	332.5
1992	372.4
1993	368.3
1994	376.9
1995	370
1996	397.7
1997	412.1
1998	435.3
1999	460.5
2000	480.1
2001	518
2002	562.6
2003	588.5
2004	668.1
2005	688.1
2006	779.7
2007	796
2008	815