Can someone please quantify the effect of military wage rates?

I haven't played for a long long time, and one of the new things is this ability to pay your military a rate other than the standard. The guide says your military will fight "better" if paid higher. However, I am wondering a couple things:

1) How fast does offense/defense increase relative to the military wage. Is it a straight progression or does the first extra 1% give more bonus than the next extra 1%?

2) Generally speaking, what do warring type provinces pay their troops?

I looked thru the entire forum for posts on Military Wage and only found one, which did not answer these questions.

Thanks in advance for your help!
- The Humble Lord Hitman