While reading forum, i found that everyone think that percent associated with a resource is the rate at which that resource are mining. But, i found that it is actually the grow rate of a resource. I've start a new game, edit my home-world planet set every resource to 1k (min amount allowed) and set % at 10, and for 1 res at 100%. Running game at 4x speed 4 a while. And then check resources deposit on planet, as i expect it grow, and resource set at 100% grow ten time faster than 10%.
Don't be confusing, i talk about not my res stock, but res deposits on planet.
So what the point with that resource market price? I've never see them grow, except for a fuel. The only way to raise a market price is to cheat with editor at start - adding some $ and set to build a few hundred destroyers.