Year	per person
1971	67.63
1972	74.65
1973	85.81
1974	107.9
1975	116.6
1976	51.84
1977	49.99
1978	49.01
1979	51.16
1980	52.52
1981	51.48
1982	53.88
1983	56.65
1984	47.19
1985	55.67
1986	54.5
1987	53.98
1988	53.38
1989	52.78
1990	52.11
1991	51.24
1992	50.03
1993	49
1994	48.1
1995	47.03
1996	49.08
1997	67.25
1998	72
1999	71.63
2000	76.14
2001	84.92
2002	89.38
2003	98.35
2004	107.1
2005	122.6
2006	134.4
2007	147.2
2008	173