What is every Big Ten Conference team's record against the over/under line as an underdog since the 2017-2018 season?

Definitions
Team Over Record Over % Under % Total +/-
Michigan 14-9-1 60.9% 39.1% +0.8
Iowa 28-20-0 58.3% 41.7% +6.1
Penn State 25-21-0 54.4% 45.6% +4.2
Maryland 20-18-0 52.6% 47.4% -1.0
Ohio State 18-18-0 50.0% 50.0% -0.2
Rutgers 30-30-2 50.0% 50.0% +0.3
Nebraska 29-31-1 48.3% 51.7% +0.6
Northwestern 28-31-2 47.5% 52.5% -0.3
Purdue 12-15-0 44.4% 55.6% -0.8
Illinois 20-26-1 43.5% 56.5% -1.5
Michigan St 3-4-0 42.9% 57.1% +1.6
Indiana 16-27-2 37.2% 62.8% -2.6
Minnesota 20-34-1 37.0% 63.0% -1.5
Wisconsin 11-27-1 28.9% 71.0% -3.9