Motorcycles are typically more agile, can accelerate quicker, and are generally perceived to be more fun to ride than an average car. Because of this, they sometimes attract people — typically, but not exclusively, young men — with a propensity to take great risks or behave dangerously. These people contribute significantly to the fatality and injury rates of motorcyclists.
The U.S. U.K. and Europe are also seeing a surge in motorcycle ownership, thanks in large part to an older demographic, people in their 40's and 50's. Many of these riders are either new to the sport, or have not been on a motorcycle for many years; they would benefit from rider training as much or more so than any new rider. A substantial increase in the number of riders (regardless of age) indicates a greater number of inexperienced riders, who are more likely to be involved in accidents.