A fatal November car crash caused by a Minnesota woman who lacked a valid driver's license has spurred questions about how many unlicensed drivers are on state roads.

Marion Guerrido only had her learner's permit and no fully licensed driver accompanying her when she crashed her car into a six-foot retaining pond in St. Louis Park, Minn. Five children rode in the car, and two died.

How widespread is the problem? Approximately 1 in 8 drivers do not have valid driving privileges, KARE found. State records show since 2008 there have been nearly 310,000 convictions of drivers getting behind the wheel without a license.

"It means that there's a small percentage of people out there who are disregarding the safety of everyone else who's doing the right thing and for the people who are doing the right thing," Minnesota State Trooper Jarod Moris told KARE. "I would recommend paying attention to whatever everyone else is doing as much as you're paying attention to what you're doing."