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Table 23. Domestic Load Factor on U.S. Airlines, Unadjusted, April 2017

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

2014201520162017
January80.779.280.679.5
February82.182.480.880.9
March85.585.885.385.4
April84.984.984.185.2
May86.385.685.9
June87.487.487.6
July87.888.187.2
August86.986.684.7
September82.183.884.2
October84.186.485.4
November81.484.284.7
December83.584.083.4
4 Mo. Value83.483.282.882.9
Yr. Value84.585.084.6
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