I do recall that the value was also higher than zero at idle. Something like low teens.
I never monitor throttle position though... instant & average MPG, coolant temp (for the grille blocks) and voltage (for engine-off periods) or speed (because my factory speedo is off following the transmission swap).
OK looking forward to your numbers.
Double checked mine.
Warmed up Idle 10-11%
WOT 77%
Yes I haven't settled on which parameters I will have on-screen but I like your suggestions.