What is every Big 12 Conference team's record against the over/under line as a home underdog since the 2015 season?

Definitions
Team Over Record Over % Under % Total +/-
Oklahoma 1-0-0 100.0% 0.0% +10.5
TX Christian 5-2-0 71.4% 28.6% +6.4
Texas Tech 9-4-1 69.2% 30.8% +11.9
Oklahoma St 6-3-0 66.7% 33.3% +2.7
Iowa State 9-7-1 56.2% 43.8% +0.4
W Virginia 5-4-0 55.6% 44.4% +7.0
Kansas 13-12-0 52.0% 48.0% -1.0
Texas 4-5-0 44.4% 55.6% +5.1
Baylor 2-5-0 28.6% 71.4% -0.2
Kansas St 4-13-0 23.5% 76.5% -3.3