 In 2002, the Port of Houston was 6th among the top sea ports in the world in terms of total cargo volume; "Air Cargo World" rated Dallas-Fort Worth International Airport as "the best air cargo airport in the world".The ship channel at the Port of Houston—the largest in the U.S. in international commerce and the sixth-largest port in the world.According to the Tax Foundation, Texans' state and local tax burdens are among the lowest in the nation, 7th lowest nationally, with state and local taxes costing $3,580 per capita, or 8.7% of resident incomes.