[Retric]

The US economy has no need to export anything into third world countries their economy's are simply to tiny accept much in the way of imports. In-fact we have long flooded most of them with cheap food which we lost money to create so balance of trade is even less valuable than you might think. http://www.census.gov/foreign-trade/balance/

Canada, is another story we really need to keep them happy: http://www.census.gov/foreign-trade/balance/c1220.html

We export half as much stuff to China: http://www.census.gov/foreign-trade/balance/c5700.html

And Ethiopia is next to nothing: http://www.census.gov/foreign-trade/balance/c7740.html