A new report estimates homelessness in Minnesota has more than doubled in the last decade.The Wilder Research Center finds an estimated 21-thousand people in the state are without permanent and stable housing on any given night. That's up from 63-hundred in 1991. The report points to many reasons for increase. At the top of the list is a lack of affordable housing for low-wage earners. Minnesota Public Radio's Lynette Nyman reports.