Year	per person
1971	28.37
1972	27.24
1973	24.24
1974	31.59
1975	32.23
1976	30.16
1977	45.49
1978	51.63
1979	32.64
1980	27.01
1981	28.57
1982	31.77
1983	28.85
1984	33.5
1985	33.7
1986	33.18
1987	35.2
1988	35.19
1989	37.22
1990	38.81
1991	36.69
1992	38.43
1993	30.06
1994	34.67
1995	33.29
1996	30.55
1997	37.5
1998	35.47
1999	43
2000	45.22
2001	47.08
2002	53.45
2003	53.39
2004	60.9
2005	58.9
2006	60.93
2007	58.59
2008	66.24