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

Definitions
Team Over Record Over % Under % Total +/-
Michigan St 32-17-0 65.3% 34.7% +2.2
Michigan 47-29-1 61.8% 38.2% +2.5
Nebraska 69-56-1 55.2% 44.8% +0.9
Iowa 46-44-1 51.1% 48.9% +2.0
Indiana 42-42-3 50.0% 50.0% -0.7
Penn St 54-55-2 49.5% 50.5% -0.1
Ohio St 37-38-1 49.3% 50.7% -0.2
Rutgers 57-62-1 47.9% 52.1% +1.5
Northwestern 50-55-4 47.6% 52.4% +0.5
Minnesota 50-57-2 46.7% 53.3% +0.3
Maryland 44-51-1 46.3% 53.7% -2.3
Purdue 26-32-0 44.8% 55.2% -1.4
Wisconsin 30-41-0 42.3% 57.8% -1.0
Illinois 34-55-0 38.2% 61.8% -2.8