MIT's Technology Review posts a nice little graph of Where Spam Is Born based upon research from Team Cymru, a security research firm in Burr Ridge, IL.
The leader of the pack of spam being sent is China followed by Brazil, Turkey and the US. The graph also shows the number of stormworm bots per country and other bots per country. According to the research there are very few Stormworm or other bots in China, while India has the most Stormworm bots but ends up eighth on the origins of spam.
RedFoxOne in comments suggests that it's only ...