The North American Free Trade Agreement (NAFTA) was fully implemented Jan. 1. Thus, the last remaining trade restrictions were removed for U.S. exports to Mexico of corn, dry edible beans, nonfat dry milk and high-fructose corn syrup, and Mexican exports to the U.S. of sugar and various horticultural products. Under NAFTA, U.S. ag exports to Canada and Mexico have increased from a total of $10.1 billion in 1994 to an estimated $28 billion in 2008.