How to find out what Ads are vistors clicking?

Hello,
I have a blog and I have registered under the Google adsense program. The problem is, I suspect Google is displaying very low cost per click ads on my site. For eg one day I got 9 clicks but that generated only $1.43. I want to know which are those ads that visitors are clicking so that I can find out the low cost per click ads as well as those which are generating high incomes.
Please tell me a way to do this. Thanks.

Original post by theredgiant