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

Definitions
Team Over Record Over % Under % Total +/-
Ohio St 5-1-0 83.3% 16.7% +12.8
Michigan 12-4-0 75.0% 25.0% +6.0
Indiana 35-26-0 57.4% 42.6% +1.5
Purdue 35-27-3 56.5% 43.6% +3.1
Maryland 31-27-0 53.5% 46.6% +2.7
Nebraska 26-24-1 52.0% 48.0% +0.9
Minnesota 25-25-0 50.0% 50.0% +0.4
Northwestern 30-32-2 48.4% 51.6% -1.9
Michigan St 21-28-0 42.9% 57.1% -2.5
Illinois 29-40-3 42.0% 58.0% -1.3
Penn St 10-14-1 41.7% 58.3% +1.8
Rutgers 32-45-0 41.6% 58.4% -1.6
Wisconsin 6-10-0 37.5% 62.5% -1.5
Iowa 14-25-0 35.9% 64.1% -4.7