What is every Big Ten Conference team's record against the over/under line as an underdog since the 2020 season?

Definitions
Team Over Record Over % Under % Total +/-
Ohio St 4-0-0 100.0% 0.0% +9.6
Michigan 4-1-0 80.0% 20.0% +7.2
Wisconsin 2-1-0 66.7% 33.3% +3.0
Indiana 19-12-0 61.3% 38.7% +1.6
Purdue 14-11-1 56.0% 44.0% +3.0
Michigan St 14-15-0 48.3% 51.7% +0.2
Rutgers 14-16-0 46.7% 53.3% +1.1
Northwestern 13-15-1 46.4% 53.6% -2.4
Minnesota 8-10-0 44.4% 55.6% -1.4
Maryland 9-12-0 42.9% 57.1% -0.8
Illinois 8-18-2 30.8% 69.2% -4.1
Penn St 3-7-1 30.0% 70.0% -5.5
Nebraska 7-17-0 29.2% 70.8% -5.4
Iowa 4-13-0 23.5% 76.5% -2.9