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Table 22. Systemwide Load Factor on U.S. Airlines, Unadjusted, April 2017

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

2014201520162017
January80.379.180.279.4
February79.880.278.879.0
March83.583.983.683.5
April83.482.582.083.9
May85.084.183.8
June86.486.486.6
July86.787.486.8
August86.586.484.6
September81.983.083.3
October82.885.083.8
November79.882.483.1
December82.682.982.8
4 Mo. Value81.981.581.381.5
Yr. Value83.483.883.4
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