Table 4: Quarterly Domestic Operating profit/loss margin (in percent),,,,,,, Regional Carriers ,,,,,,, Ranked by 2ndQuarter 2005 Margin ,,,,,,, (Operating Profit/Loss as Percent of Total Operating Revenue),,,,,,, "2Q 2005 Rank",Regional Carriers,"2nd Quarter 2004 (%)","3rd Quarter 2004 (%)","4th Quarter 2004 (%)","1st Quarter 2005 (%)","2nd Quarter 2005 (%)","2nd Quarter Operating Profit/Loss $(Millions)" 1,American Eagle,15.5,14.1,14.9,13.5,14.3,62.5 2,Mesa,11.1,7.9,11.9,13.2,13.9,39.2 3,SkyWest,13.2,12.3,11.3,10.1,11.6,44.6 4,Pinnacle,11.1,11.0,9.7,10.3,10.7,22.8 5,Atlantic Southeast,6.7,9.0,9.4,-0.2,10.2,29.5 6,ExpressJet,12.6,12.4,13.3,9.1,9.2,32.4 7,Comair,7.9,8.1,-0.2,1.6,4.4,14.3 ,Seven-Carrier Total,11.5,11.0,10.4,8.5,10.7,245.3 "Source: Bureau of Transportation Statistics; Form 41, Schedule P1.2 ",,,,,,, ,,,,,,, ,,,,,,,