I've historically gotten anywhere from about 4% to about 20%. Most of them though have been 10% or under. The higher end ones tend to be because of promotions or "adjustments". Last two years though, we've gotten 0% - no one, not even the execs. Software company - bad economic times. Glad to just have a job.
That's not counting, of course, bonuses and non-monetary "raises", such as having to pay less of a premium for health insurance or getting more vacation time.