What we do know is that in 2010 the estimate was that 90% of all e-mail traffic was spam. In Canada the estimate was that every Canadian received approximately 49 e-mail messages of spam on a daily basis, on average. So certainly it's significant. Also, that doesn't account for your spam filters that are getting rid of a lot of that. So certainly it is a significant problem, and we do hope that the new legislation will have the impact we're looking for.
On October 5th, 2011. See this statement in context.