Modern dogs are so far from what they were bred for, the dominant influence by far is the influence of the owners. The only relevant statistic would be: percent of bites by dogs that are owned by humans who have not properly trained the dog. That will be a statistics that is more than trivia, the charts in that article are useless trivia paid for by tax dollars.

A useful study would be able to provide a recommended course of action an owner could take to reduce the likelihood their dog bites, which is what my proposed study above would do. TRAIN YOUR DOGS PEOPLE.