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

Definitions
Team Over Record Over % Under % Total +/-
Michigan St 24-11-0 68.6% 31.4% +4.1
Michigan 33-28-3 54.1% 45.9% +2.3
Nebraska 58-52-2 52.7% 47.3% +1.9
Rutgers 66-60-3 52.4% 47.6% +1.4
Penn State 50-46-0 52.1% 47.9% +2.8
Iowa 41-38-1 51.9% 48.1% +3.1
Indiana 37-39-2 48.7% 51.3% +0.1
Ohio State 34-36-1 48.6% 51.4% +0.1
Northwestern 48-52-4 48.0% 52.0% -0.0
Maryland 30-34-2 46.9% 53.1% -0.3
Purdue 22-26-0 45.8% 54.2% -0.4
Minnesota 40-54-1 42.5% 57.5% -1.0
Illinois 36-58-1 38.3% 61.7% -3.1
Wisconsin 18-42-1 30.0% 70.0% -3.4