The unemployment rate in Minnesota is about three percent. That's lower than its been in decades, and many businesses are finding their biggest challenge is filling job openings. Some say they're having to turn away potential customers because they don't have enough employees to get the job done. Demographers have been warning of the shortage for several years. They say there aren't enough people entering the workforce to replace retiring baby boomers and they say it's a situation that's not going to change anytime soon. Minnesota Public Radio's Mark Zdechlik reports.