Unbelievable. Or, believable that it's true, but unbelievable that it's come to this.
"On average, spam accounted for 87% of e-mail traffic this year, a 30% increase over a year ago. Spam rates, however, varied considerably by user and organization. Some small enterprises had spam rates as low as 45%, while large free e-mail providers got pummeled with rates as high as 98%. In general, business e-mail accounts received a smaller percentage of spam than consumer accounts."
(From InformationWeek, via TUAW)