It depends on the category. Some categories can get 5% or higher clickthrough rates. The revenue per click also depends on the category. You probably should use AdSense as filler inventory and concentrate on other revenue sources.
For what it's worth, sharing your numbers is against the Google TOS. They're pretty quick to ban sites for all kinds of reasons. Just a friendly heads up!
it may be because clicks been generated from other than USA or Uk n you must consider highly paying keywords on your site posts , filter your google adsense account add those keywords as well so that relevant ad can be displayed.