Year	per person
1971	216.7
1972	225.8
1973	232.9
1974	237.7
1975	255.4
1976	280.7
1977	282.8
1978	291.7
1979	303.9
1980	312.4
1981	310.5
1982	294.4
1983	302.7
1984	316.8
1985	317.8
1986	338.4
1987	372.3
1988	346.9
1989	324.8
1990	336.7
1991	358.8
1992	393.6
1993	426.9
1994	456.7
1995	484.2
1996	493.2
1997	511.5
1998	523.5
1999	555
2000	570.2
2001	578
2002	554.4
2003	557.1
2004	575.1
2005	614.7
2006	653.5
2007	708.6
2008	768.4