id	keyword
commonwealth-507	nafta
commonwealth-507	exports
commonwealth-507	mexico
commonwealth-507	pennsylvania
commonwealth-507	canada
commonwealth-507	nations
commonwealth-507	trade
commonwealth-507	products
commonwealth-507	non
commonwealth-507	countries
commonwealth-507	year
commonwealth-507	increase
commonwealth-507	state
commonwealth-507	data
commonwealth-507	u.s
commonwealth-507	united