Year	per person
1971	28.1
1972	31.31
1973	35.02
1974	38.7
1975	44.89
1976	49.5
1977	56.13
1978	62.92
1979	68.96
1980	76.53
1981	84.34
1982	86.29
1983	93.75
1984	90.35
1985	105.1
1986	110.6
1987	118.6
1988	117.4
1989	125.3
1990	133.4
1991	142.4
1992	155.8
1993	171.7
1994	183.7
1995	195.2
1996	201.9
1997	218
1998	220.4
1999	218.7
2000	229.1
2001	249.4
2002	257.2
2003	277.2
2004	274.9
2005	283.4
2006	291.7
2007	297.7
2008	325.8