Year	per person
1971	150.4
1972	150.6
1973	176.8
1974	173.7
1975	195.8
1976	220.9
1977	198.5
1978	235.7
1979	294.3
1980	343.3
1981	350.3
1982	384.7
1983	482.8
1984	561
1985	584.1
1986	599.6
1987	622.2