When the time comes.
How much raise do you is, in percentage?

Come again?

@Jilano
You're doing God's work, man.

How much raise in percentage to you ask ?

That heavily depends on where in your career you are. Early in your career I would expect your yearly percentage increase to be significantly higher than it is later in your career.

The absolute minimum you should get is the cost-of-living increase (Consumer Price Index + any additional cost increases), otherwise it's effectively a wage decrease.

I'd also suggest looking at the wage profile of people with the same amount of experience as you in similar companies as well. The internet should help there.