And Icarus, add to that Perth is the only airport in the world I've flown into that actually goes out of its way to make a runway with tailwind the duty runway, and you would have 21 as the most used runway I would think.
WRT Pearce, I could never understand why they couldn't fly at low level (as RAAF pilots like to do) up north or down south. No, much better to have commercial aircraft flying 1000s of extra miles so that a handful of single engine light aircraft, most of which are not even our own, are not inconvenienced. Joint user airports the world over don't have half the hassles of Perth /Pearce