Table 4: Quarterly Domestic Operating profit/loss margin (in percent),,,,,,, Regional Carriers ,,,,,,, Ranked by 4th Quarter 2004 Margin ,,,,,,, (Operating Profit/Loss as Percent of Total Operating Revenue),,,,,,, 4Q 2004 Rank,Regional Carriers,4th Quarter 2003 (%),1st Quarter 2004 (%),2nd Quarter 2004 (%),3rd Quarter 2004 (%),4th Quarter 2004 (%),4th Quarter Operating Profit/Loss $(Millions) 1,American Eagle,20.6,16.3,15.5,14.1,14.9,59.5 2,ExpressJet,12.9,12.5,12.6,12.4,13.3,47.3 3,Mesa,N/A,12.3,11.6,11.7,12.4,28.7 4,SkyWest,12.2,13.7,13.2,12.3,11.3,36.8 5,Pinnacle,N/A,10.7,11.1,11.0,9.7,17.5 6,Atlantic Southeast,9.8,7.7,6.7,9.0,9.4,24.8 7,Comair,16.5,6.9,7.9,8.1,-0.2,-0.6 ,Seven-Carrier Total,N/A,11.0,11.5,11.0,10.4,214.0 "Source: Bureau of Transportation Statistics; Form 41, Schedule P1.2 ",,,,,,,