What is every Big Ten Conference team's record against the over/under line as a road underdog since the 2014-2015 season?

Definitions
Team Over Record Over % Under % Total +/-
Michigan St 28-12-0 70.0% 30.0% +3.6
Michigan 41-26-0 61.2% 38.8% +2.5
Nebraska 59-44-1 57.3% 42.7% +2.1
Indiana 37-36-3 50.7% 49.3% -0.8
Rutgers 49-49-1 50.0% 50.0% +2.1
Iowa 38-39-1 49.4% 50.7% +1.4
Ohio St 33-34-1 49.3% 50.8% 0.0
Northwestern 42-44-3 48.8% 51.2% +0.9
Penn St 44-47-2 48.4% 51.7% 0.0
Maryland 37-42-1 46.8% 53.2% -2.0
Minnesota 43-51-2 45.7% 54.3% +0.2
Wisconsin 28-35-0 44.4% 55.6% 0.0
Illinois 31-41-0 43.1% 56.9% -1.6
Purdue 16-25-0 39.0% 61.0% -2.4