Table 2. System* Quarterly Operating profit/loss margin (in percent),,,,,,, Network Carriers ,,,,,,, Ranked by 3rd Quarter 2006 Margin ,,,,,,, (Operating Profit/Loss as Percent of Total Operating Revenue),,,,,,, 3Q 2006 Rank,Network Carriers,3rd Quarter 2005 (%),4th Quarter 2005 (%),1st Quarter 2006 (%),2nd Quarter 2006 (%),3rd Quarter 2006 (%),3rd Quarter Operating Profit/Loss $(Millions) 1,Northwest,-11.7,-8.6,-0.2,9.2,11.1,379 2,United,3.8,-4.6,-3.8,5.1,6.6,341 3,US Airways,-1,-4,2.4,12.6,5.9,124 4,Continental,2.9,-3.7,-0.1,6.8,4.9,170 5,American,-0.5,-8.5,1,7,3.8,220 6,Delta,-4.4,-12.3,-12.8,8,3,143 7,Alaska,11.7,-3.7,-25.1,6.3,0.5,4 ,Seven-Carrier Total,-0.2,-7.3,-3.3,7.5,5.4,"1,381" "Source: Bureau of Transportation Statistics; Form 41, Schedule P1.2 ",,,,,,, * System = domestic + international ,,,,,,, ,,,,,,,