pre_text: future regulatory developments future regulatory developments and actions could affect operations and increase operating costs for the airline industry , including our airline subsidiaries . see part i , item 1a . risk factors - " if we are unable to obtain and maintain adequate facilities and infrastructure throughout our system and , at some airports , adequate slots , we may be unable to operate our existing flight schedule and to expand or change our route network in the future , which may have a material adverse impact on our operations ," "our business is subject to extensive government regulation , which may result in increases in our costs , disruptions to our operations , limits on our operating flexibility , reductions in the demand for air travel , and competitive disadvantages" and "we are subject to many forms of environmental regulation and may incur substantial costs as a result" for additional information . employees and labor relations the airline business is labor intensive . in 2013 , salaries , wages , and benefits were one of our largest expenses and represented approximately 22% ( 22 % ) of our operating expenses . the table below presents our approximate number of active full-time equivalent employees as of december 31 , 2013 . american us airways wholly-owned regional carriers total .
post_text: .
table: American US Airways Wholly-owned Regional Carriers Total
table: Pilots 7,900 4,100 3,400 15,400
table: Flight attendants 15,000 7,700 2,100 24,800
table: Maintenance personnel 11,300 3,100 2,400 16,800
table: Fleet service personnel 7,400 5,500 1,700 14,600
table: Passenger service personnel 10,300 6,200 6,400 22,900
table: Administrative and other 8,200 5,500 2,200 15,900
table: Total 60,100 32,100 18,200 110,400
question: Analyse this data from a financial earnings document. what portion of the total full-time employees of american are flight attendants?