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

Definitions
Team Over Record Over % Under % Total +/-
Purdue 7-4-0 63.6% 36.4% +7.0
Northwestern 5-3-0 62.5% 37.5% -5.7
Indiana 3-2-0 60.0% 40.0% +7.3
Nebraska 3-2-0 60.0% 40.0% +3.6
Minnesota 3-3-0 50.0% 50.0% +1.6
Penn State 2-2-0 50.0% 50.0% +6.1
Michigan 1-1-0 50.0% 50.0% +2.5
Wisconsin 1-1-0 50.0% 50.0% +1.0
Maryland 4-4-0 50.0% 50.0% +0.1
Rutgers 3-4-0 42.9% 57.1% +2.6
Iowa 1-2-0 33.3% 66.7% -13.7
Michigan St 1-2-0 33.3% 66.7% -7.5
Illinois 2-6-0 25.0% 75.0% -8.0