Table 4: Operating Expenses (Excluding Fuel/Labor) per Enplanement,,,,,,,,
Passenger Airlines by Group,,,,,,,,
Ranked by First Quarter 2006 Performance,,,,,,,,
(Cost in dollars excluding fuel and labor expenses per passenger enplanement) ,,,,,,,,
 1Q 2006 Rank ,,1Q 2001,1Q 2002,1Q 2003,1Q2004,1Q 2005,1Q 2006,"Change
1Q 2001-1Q 2006"
1,Network Airlines,92,93,100,109,110,120,28
2,Low Cost Airlines,42,46,42,43,43,43,1
,14-Carrier Average,81,83,85,91,92,97,16
,Group Dollar Difference,50,47,58,66,67,77,27
"Source: Bureau of Transportation Statistics, Form 41 Airline Financial Data and T-100 Market Data.",,,,,,,,