According to a report in the American Journal of Public Health, in the period of from 2001 to 2007, an estimated 16,000 people in the US, were killed by drivers who were distracted by talking or texting on mobile phones.
(The research also found that a growing number of these drivers were under 30. The problem is everyone thinks it won't happen to them, because they know what they're doing. It's like drink driving - just don't do it.)