The top twelve spam producing according to the latest report from Sophos.

1. United States – 42.11%
2. South Korea – 13.43%
3. China (incl Hong Kong) – 8.44%
4. Canada – 5.71%
5. Brazil – 3.34%
6. Japan – 2.57%
7. France – 1.37%
8. Spain – 1.18%
9. United Kingdom – 1.13%
10. Germany – 1.03%
11. Taiwan – 1.00%
12. Mexico – 0.89%
Others – 17.8%

Source: Sophos articles about spam: The “Dirty Dozen” 2004: Sophos reveals the top spamming countries