Table 5. Airline Domestic Unit Revenue (Cents Per Mile),,,,,,, Passenger Airlines by Group ,,,,,,, Ranked by 4th Quarter Domestic Unit Revenue ,,,,,,, (Domestic Operating Revenue Per Available Seat Mile),,,,,,, 4Q 2004 Rank,,4th Quarter 2003,1st Quarter 2004,2nd Quarter 2004,3rd Quarter 2004,4th Quarter 2004,4th Quarter Operating Revenue $(Millions) 1,Regionals,N/A,14.6,14.1,14.2,14.6,"2,062.0" 2,Network,11.4,11.5,12.1,11.7,11.8,"13,879.4" 3,Low-Cost,7.9,7.8,8.5,8.0,7.9,"3,415.1" ,21-Carrier Total,N/A,10.8,11.4,11.0,11.1,"19,356.5" "Source: Bureau of Transportation Statistics; Form 41, Schedule P1.2. T100; T2 Data",,,,,,,