Shoutbox

Ok, well for my school research, I have to choose three Instant Messaging softwares to study.. now I thought I would take the most popular ones.. now I think I know which they are ( MSN, AIM, Yahoo ) but I really need something prooving me which is the best. So I was thinking if there was any stats around the web.. saying like MSN Messenger : 700000 downloads, Yahoo 343343 Dwls, etc..

I have tried looking on the IM softwares, but couldnt find it. I also tried googling it.. ant find anything.. or maybe I just dont have the googling skills it takes..

any help would be appreciated

(btw, I need sources of stats.. the more concrete it is, the better)