Year	per person
1971	31.7
1972	40.01
1973	42.26
1974	44.76
1975	52.26
1976	56.39
1977	63.66
1978	68.54
1979	63.46
1980	72.73
1981	70.4
1982	70.22
1983	71.5
1984	72.86
1985	72.29
1986	76.44
1987	71.94
1988	66.96
1989	76.35
1990	80.13
1991	82.17
1992	90.04
1993	94.98
1994	99.34
1995	103.1
1996	104.3
1997	107.6
1998	111.9
1999	124.9
2000	130.5
2001	130.5
2002	126.3
2003	175.5
2004	183.3
2005	184.5
2006	184.8
2007	185.5
2008	187.3