Year	per person
1971	33.41
1972	35.97
1973	43.1
1974	47.62
1975	54.04
1976	60.3
1977	69.71
1978	78.68
1979	88.5
1980	108.7
1981	120.3
1982	129.8
1983	142.7
1984	152.7
1985	154.9
1986	170.8
1987	182.5
1988	202
1989	203.6
1990	232.1
1991	257
1992	286.2
1993	334.6
1994	398.7
1995	448
1996	463.3
1997	480.5
1998	484.2
1999	508.2
2000	514.6
2001	507.1
2002	476.3
2003	431.1
2004	430.4
2005	494.9
2006	523
2007	502.9
2008	528.6