Numbers

By Melissa August, Harriet Barovick, Elizabeth L. Bland, Janice Horowitz, Sora Song, Rebecca Winters And Yi Zhou

71% Percentage of adults in a recent survey who could name a member of the rock band U2

15% Percentage who could name the Chief Justice of the U.S.

14% Percentage increase in the risk of dying after surgery if a nurse has six patients instead of four

94,000 Number of vacancies in nursing jobs last year in the U.S.

36% Percentage of motorists who admit they "often" or "sometimes" talk on a cell phone while driving

8% Percentage who admit they "often" or "sometimes" steer with their legs

Sources: National Journal, J.A.M.A., ABC, USA Today