What is every Big Ten Conference team's record against the over/under line as an underdog since the 2012-2013 season?

Definitions
Team Over Record Over % Under % Total +/-
Michigan 69-48-4 59.0% 41.0% +2.2
Michigan St 53-43-0 55.2% 44.8% +1.9
Ohio St 65-55-1 54.2% 45.8% +2.0
Penn St 106-93-2 53.3% 46.7% +2.3
Nebraska 119-108-2 52.4% 47.6% +0.9
Purdue 48-44-0 52.2% 47.8% +2.1
Iowa 68-68-2 50.0% 50.0% +1.4
Minnesota 96-96-3 50.0% 50.0% +0.6
Indiana 69-70-3 49.6% 50.4% -0.4
Rutgers 102-108-4 48.6% 51.4% +0.5
Maryland 68-77-2 46.9% 53.1% -1.0
Northwestern 88-109-5 44.7% 55.3% -0.5
Wisconsin 50-71-1 41.3% 58.7% -1.3
Illinois 62-91-1 40.5% 59.5% -2.1