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 48-35-0 57.8% 42.2% +2.7
Michigan 59-44-3 57.3% 42.7% +1.8
Ohio St 60-51-1 54.1% 46.0% +2.2
Nebraska 100-85-2 54.1% 46.0% +1.8
Penn St 85-76-2 52.8% 47.2% +2.4
Indiana 61-61-3 50.0% 50.0% -0.2
Iowa 58-59-2 49.6% 50.4% +1.3
Minnesota 83-86-3 49.1% 50.9% +0.2
Rutgers 84-90-4 48.3% 51.7% +0.7
Northwestern 73-84-4 46.5% 53.5% +0.5
Maryland 54-65-2 45.4% 54.6% -1.2
Purdue 27-34-0 44.3% 55.7% 0.0
Illinois 49-68-1 41.9% 58.1% -1.6
Wisconsin 44-62-1 41.5% 58.5% -0.8