Table 5.  System* Airline Unit Revenue (Cents Per Mile),,,,,,,
Passenger Airlines by Group ,,,,,,,
Ranked by 1st Quarter 2007 Unit Revenue ,,,,,,,
(Operating Revenue Per Available Seat Mile),,,,,,,
1Q 2007 Rank,Carrier Group,1st Quarter 2006 ,2nd Quarter 2006 ,3rd Quarter 2006 ,4th Quarter 2006 ,1st Quarter 2007 ,1st Quarter Operating Revenue $(Millions)
1,Regional ,15.4,15.2,15.0,15.0,14.9,2357
2,Network ,13.1,14.4,14.1,13.5,13.5,22536
3,Low-Cost ,9.5,10.9,10.1,9.8,9.6,4825
,21-Carrier Total,12.5,13.8,13.3,12.8,12.7,29718
" Source: Bureau of Transportation Statistics; Form 41, Schedule P1.2.  T100; T2 Data",,,,,,,
* System = domestic + international ,,,,,,,