Chances to hit top pair

I'm looking for a chart that gives odds of hitting top pair with a given card. What I mean is, if I hold a K, what the chances are that I will hit the king and that the king will be top pair. I know for A it's about 13.5%. I know I've seen a chart somewhere, but I can't remember where.

[obsidian]

Might want to check in the probability forum.

Thanks. I didn't realise there was one.