Percentage of Online Users?

I'm doing some research with my studies and wanted to have some inputs regarding numbers..

can someone show me the percentage of online users from USA, Europe & Australia who prefer using google as their main search engine..

any ideas?

 

Here's something to get you started.
http://searchenginewatch.com/reports/article.php/2156451

 

thanks for the resource but I'm still looking for a percentage of countries using google as their search engine..

I've already found one yet its not enough.

 

There should be some stats at Google... I have watched them, but i don't remember where.

 

As far as my site goes, 75% are from US, rest of 25% from various countries.

 

I guess, google analytics will also help solve my problems.

thanks for all your ideas.

 

I think google still hold no 1 place, if you study the user search habit they slowly move to yahoo and MSN during search, which usually turn a small amount of traffic to those search engines but users usually turn toward google eventually for better search.