If you take the percentage of spam received by the honeypots and weigh it against the number of internet users per country, the top 12 looks something like this:
1. South Korea (4.4 mess/user)
2. Canada (2.8 mess/user)
3. US (2.1 mess/user)
4. Brazil (1.7 mess/user)
5. China (0.92 mess/user)
6. Mexico (0.89 mess/user)
7. Taiwan (0.86 mess/user)
8. Spain (0.82 mess/user)
9. France (0.59 mess/user)
10. Japan (0.39 mess/user)
11. UK (0.32 mess/user)
12. Germany (0.22 mess/user)
South Korea doubles the average spam production of the US, and Mexico is far from being as well behaved at Sophos puts it.
One should study the spam control measures in place in Japan, the UK and Germany, since they seem to be working pretty well to limit production.
Stat calculations are based on a hypothetical 1e6 messages received by honeypots, and internet users by country were taken from internetworldstats.com
I've never been canoeing before, but I imagine there must be just a few simple heuristics you have to remember... Yes, don't fall out, and don't hit rocks.
