Table 1: Quarterly Domestic Operating profit/loss margin (in percent),,,,,,, Passenger Airlines by Group ,,,,,,, Ranked by 2nd Quarter 2005 Margin ,,,,,,, (Operating Profit/Loss as Percent of Total Operating Revenue),,,,,,, "2Q 2005 Rank",,"2nd Quarter 2004 (%)","3rd Quarter 2004 (%)","4th Quarter 2004 (%)","1st Quarter 2005 (%)","2nd Quarter 2005 (%)","2nd Quarter Operating Profit/Loss $(Millions)" 1,Regional Carriers,11.5,11,10.4,8.5,10.7,245.3 2,Low-Cost Carriers,7.1,3.6,-11.5,-4.3,5.3,206.4 3,Network Carriers,-2.8,-7.6,-15.8,-9.9,-2.2,-355.6 ,21-Carrier Total,0.3,-3.8,-12.2,-6.9,0.4,96.1 "Source: Bureau of Transportation Statistics; Form 41, Schedule P1.2 ",,,,,,, ,,,,,,, ,,,,,,,