Some South Dakota counties getting younger

Number of Dewey, Ziebach and Corson County residents under age 19 well above state averageCollege towns and high birth rates have increased the average number of young people in some South Dakota counties, even as 17.3 percent of the state’s residents are 65 or older, according to U.S Census data.In 2010, the age group of 15-19 was the third most common in South Dakota and by 20...