If indeed the list you showed was of the top LV Bowl crowds, then the 2008 and 2009 LV Bowl attendance should be #4 and #5, repectively.
Apparently, BYU matchups in the LV Bowl have outdrawn any other matchup by a long shot.
FROM YOUR MESSAGE:
Top Pioneer Las Vegas Bowl Crowds:
44,615 - 2006 BYU - Oregon
40,712 - 2007 BYU - UCLA
40,053 - 2005 BYU - California
30,894 - 2001 Utah - USC
30,324 - 2002 UCLA - New Mexico
Dec 20, 2008: LV Bowl 40,047
BYU (10-2) lost Arizona 21-31
Dec 22, 2009: LV Bowl 40,018
BYU #14 (10-2) beat Oregon St #18 (8-4)