During Q3 2010, Asia was responsible for 30% of all spam. The output has now increased to 50.1% from 35.1% at the beginning of 2011.
The top 12 spam relaying countries for July-September 2011
The top spam relaying continents for July - September 2011
If you want to help fight spam: Don't ever be tempted to buy anything via spam, as that's what makes it worthwhile for the spammers.