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 +/-
Michigan 2-0-0 100.0% 0.0% +2.5
Indiana 4-1-0 80.0% 20.0% +11.4
Iowa 3-1-0 75.0% 25.0% -0.2
Nebraska 4-3-0 57.1% 42.9% +2.4
Illinois 5-4-0 55.6% 44.4% +3.9
Purdue 2-2-0 50.0% 50.0% +3.0
Minnesota 3-3-0 50.0% 50.0% +4.5
Penn State 1-1-0 50.0% 50.0% -6.0
Wisconsin 2-2-0 50.0% 50.0% +4.1
Maryland 4-4-0 50.0% 50.0% +0.7
Northwestern 3-6-0 33.3% 66.7% -9.2
Rutgers 3-8-0 27.3% 72.7% -3.0
Michigan St 1-4-0 20.0% 80.0% -9.3