So much so they had to pass laws to make it illegal for police to do chases in many cities/situations to stop them.
http://abcnews.go.com/US/police-chases-california-injured-10...
More bystanders are injured or killed during high-speed police chases than by stray bullets. In California, more than 10,000 people have been injured and over 300 people killed because of police chases in the last decade, according to newly released statistics from the California Highway Patrol.
Nationally, it's estimated nearly 300 people die each year as a result of high speed police chases.