Year	% of merchandise imports
1970	5.6077339942511
1971	6.397404288734962
1972	5.951643515428485
1973	5.673432278213002
1974	11.122700891875445
1975	9.060280219329908
1976	8.516906533039267
1977	11.317660893853171
1978	11.112858703922095
1979	12.974581664133119
1981	12.040179259956368