What is every Big 12 Conference team's record against the over/under line in post-season bowl games since the 2012 season?

Definitions
Team Over Record Over % Under % Total +/-
Texas Tech 3-1-0 75.0% 25.0% +3.4
Baylor 4-3-0 57.1% 42.9% +5.3
TX Christian 3-3-0 50.0% 50.0% +1.4
Oklahoma 4-5-0 44.4% 55.6% +5.2
W Virginia 3-4-0 42.9% 57.1% -2.0
Kansas St 3-4-0 42.9% 57.1% -3.1
Oklahoma St 3-6-0 33.3% 66.7% -2.6
Texas 2-5-0 28.6% 71.4% -7.6
Iowa State 0-5-0 0.0% 100.0% -10.0