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

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

2014201520162017
January84.382.983.883.3
February83.984.083.482.7
March83.683.982.583.2
April83.982.883.4
May84.083.283.6
June83.183.683.8
July83.183.983.4
August83.384.282.6
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