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

Definitions
Team Over Record Over % Under % Total +/-
Ohio St 8-4-0 66.7% 33.3% +7.9
Michigan 18-12-0 60.0% 40.0% +1.8
Indiana 49-33-0 59.8% 40.2% +2.7
Penn St 21-17-1 55.3% 44.7% +2.9
Nebraska 33-27-1 55.0% 45.0% +2.7
Purdue 48-40-3 54.6% 45.5% +2.3
Maryland 43-37-0 53.8% 46.3% +2.6
Minnesota 36-35-2 50.7% 49.3% -0.4
Wisconsin 11-12-1 47.8% 52.2% +1.2
Northwestern 36-43-3 45.6% 54.4% -1.7
Michigan St 26-32-0 44.8% 55.2% -2.3
Illinois 41-52-4 44.1% 55.9% -0.1
Rutgers 38-56-0 40.4% 59.6% -1.6
Iowa 20-32-0 38.5% 61.5% -3.5