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Table 10. Systemwide Load Factor on U.S. Airlines, Seasonally-Adjusted, May 2017
Systemwide (Domestic + International) RPMs/ASMs (both seasonally-adjusted) in percent, Scheduled service only
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Load factor is a measure of the use of aircraft capacity that compares Revenue Passenger-Miles (RPMs) as a proportion of Available Seat-Miles (ASMs).
Bureau of Transportation Statistics, T-100 Segment