Air transportation
481	Air transportation
4811_L	Scheduled air transportation Lines
48111	Scheduled air transportation
48111_L	Scheduled air transportation Lines
481111_L	Scheduled passenger air transportation Lines
481112_L	Scheduled freight air transportation Lines
4812_L	Nonscheduled air transportation Lines
48121	Nonscheduled air transportation
48121_L	Nonscheduled air transportation Lines
481211_L	Nonscheduled chartered passenger air transportation Lines
481212_L	Nonscheduled chartered freight air transportation Lines
481219_L	Nonscheduled air transportation Miscellaneous Lines

A separate report is available for each of the above. Reports with the suffix '_L' refers to reports with a Product Line breakdown.