When one thinks of an "export," one normally thinks of objects that are boxed and loaded onto container ships in Galveston or Long Beach, like manufacturing or agricultural products. But since it involves the consumption of U.S. goods and services with foreign currency, international travel and tourism falls into the "export" category as well—and it greatly outperforms most other U.S. industries in that capacity, according to this study from the U.S. Travel Association.