Otto has a great chart on Colombian trade, which he posted in December but I had missed. I hope he doesn't mind me nabbing it: please click on his post too.
His point was that Colombia will get hit by the drop in oil prices, which you normally hear about Venezuela. I thought of something else, which is the effect of the U.S.-Colombia FTA, which went into effect in May 2012. It was supposed to work wonders in various ways, and GDP might have made it appear that way. But it is definitely not diversifying exports.