Year	% of merchandise exports
1962	0.003000593893883827
1966	0.1471266922290836
1970	0.0001974010559046158
1972	0.011514059892324745
1973	0.047458302054710445
1974	0.0005963391352940706
1975	0.018207544877850045
1976	0.05851245993962405
1977	0.2551631007201157
1978	0.2936793520361518
1979	1.167915082848863
1980	4.822734098237138
1981	0.21156904095578732
1982	1.1177815499869692