What's the standard raise heads up?

[Vee Quiva]

I have been getting way too many seconds and not enough firsts lately, so I am tryin to analyze my heads up play.

Assume 10,000 chips in play and you are relatively even in chips.
What amount do you raise preflop with the blinds at:
100-200
150-300
200-400
250-500

When you opponent is at less than 5 times the big blind, do you raise enough to put him all in every time?