How many iPhone users have first gen devices?

Hey guys, I'm sure this question MUST have been asked but after a lot of googling, I can't seem to find a straight answer anywhere:

What percentage of the iphone/ipod market is using what device?

I'm asking because I'm getting some bad frame rates on my 1st gen ipod and I'm wondering how concerned I need to be about this.

Not many. A year ago, there was only 2%, plus 2% who had the ipod touch 1st gen. So that was 4% a year ago. Likely it's way less now.

Its generally accepted to target the Iphone 3GS and above, though there are still a good amount of 3G iphones, but it's hardly worth it, it's so gimped.

http://www.appleinsider.com/articles/10/04/27/nearly_30_of_apples_first_gen_iphones_are_still_in_use_report.html