[davedd]

In terms of countries (based on the IP address of the spammer):

#1 USA (30%)

#2 China (20%)

#3 Russia (6%)

#4 Brazil (4%)

[ihsw]

IP addresses aren't reliable, especially when considering spammers will know IP address geolocation will be used. It may be safe to assume a vast majority of US IP addresses will actually be proxies.