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Don't get us wrong, there's spam everywhere; the global spam rate for September 2009 is 86.4 percent. But Idaho's eerily high rate is also a surprise because it jumped 43 spots since 2008; back then it was ranked the 44th most spammed state. We can only guess as to whether spammers have developed some special relationship with Idaho, or it's all pure coincidence.
If spam drives you mad, the best US state to be living in is the US territory of Puerto Rico, with (just?) 83.1 percent of spam, followed by Montana, Alaska, Kansas, South Dakota, Tennessee, Vermont, Rhode Island, Wisconsin and Florida.