As seen in the below graphic via Alejandro Zuniga, while Big House capacity has shrunk a bit this season, there has been an increase in average attendance for the home games (Oregon State, UNLV, BYU, Northwestern, Michigan State and Rutgers).
https://twitter.com/ByAZuniga/status/666290924578803712/photo/1
Would imagine with the biggest game of the year – Nov. 28th against Ohio State – the average attendance will be pushed to over 110,000 for the year.