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CBSSports.com reports the Big 12 (minus TCU) teams' increases in revenue, 2006-2011 are: 
53.7% 
61.7% 
-65.8% 
17.6% 
61.1% 
20.3% 
49.8% 
21.1%
Biggest net income: Oklahoma State, 2006: $161,063,918. Biggest deficit: Oklahoma State, 2009: $20,029,043.
Pickens U's negative trajectory stems from the $211 million in contributions it took in 2006 from its sugar daddy. Baylor does not report data sufficient to include it in this report, which did not include non-BCS teams.