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Table 11. Domestic Load Factor on U.S. Airlines, Seasonally-Adjusted, May 2017

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

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2014201520162017
January85.384.085.184.5
February85.085.184.683.8
March85.285.483.684.6
April84.684.384.784.7
May84.884.285.085.1
June84.384.884.9
July84.685.084.3
August84.485.283.5
September84.185.284.9
October83.685.885.0
November84.084.885.1
December84.085.784.6
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