1) Electronics/computers: US$201.7 billion (13% of total exports)
2) Electrical machinery, equipment: $174.2 billion (11.3%)
3) Mineral fuels including oil: $138 billion (8.9%)
4) Aircraft, spacecraft: $131.2 billion (8.5%)
5) Vehicles: $130.1 billion (8.4%)
6) Optical, technical, medical apparatus: $83.6 billion (5.4%)
7) Plastics, plastic articles: $61.5 billion (4%)
8) Gems, precious metals: $60.4 billion (3.9%)
9) Pharmaceuticals: $45.1 billion (2.9%)
10) Organic chemicals: $36.2 billion (2.3%)
The great part about it is I don't see these categories going away anytime soon as they are extremely relevant. Now if clothes pins were one of our greatest exports, I'd be very worried!