What is every Big Ten Conference team's record against the over/under line as a road underdog since the 2018 season?

Definitions
Team Over Record Over % Under % Total +/-
Ohio St 1-0-0 100.0% 0.0% +8.0
Michigan 4-0-0 100.0% 0.0% +7.4
Indiana 15-7-0 68.2% 31.8% +6.5
Wisconsin 3-2-0 60.0% 40.0% +6.1
Illinois 10-14-1 41.7% 58.3% 0.0
Purdue 6-9-1 40.0% 60.0% -1.7
Iowa 6-9-0 40.0% 60.0% -2.1
Nebraska 8-12-0 40.0% 60.0% -2.5
Maryland 7-11-0 38.9% 61.1% -3.7
Northwestern 8-13-2 38.1% 61.9% -3.9
Minnesota 6-10-0 37.5% 62.5% -2.0
Michigan St 7-14-0 33.3% 66.7% -2.1
Penn St 2-6-0 25.0% 75.0% -6.9
Rutgers 6-19-0 24.0% 76.0% -4.8