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Table 10. Systemwide Load Factor on U.S. Airlines, Seasonally-Adjusted, August 2017

Systemwide (Domestic + International) RPMs/ASMs (both seasonally-adjusted) in percent, Scheduled service only

2014201520162017
January84.383.083.983.4
February83.983.983.382.7
March83.683.982.583.3
April83.882.783.283.9
May84.083.183.483.8
June83.283.783.983.6
July83.284.083.583.9
August83.384.182.683.5
September83.183.983.6
October82.684.683.6
November82.783.784.2
December82.984.183.5
Notes: 

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).

Source: 

Bureau of Transportation Statistics, T-100 Segment