Area rock shops. The Southern Hills are a rich lode for rock lovers, as evidenced by the number of rock shops -- from rustic to refined -- that grace the area. Here's a list of rock shops of western South Dakota: Rapid City -- Indigo Iris Rocks & Stones (484-2465). Custer -- Ken's Minerals (673-4935); Scott's Rock Shop & Free Museum (673-4859); Wild Bill's Antique Mall & Rock Shop (673-4186); the Rock Shop.
Answer Wiki. The average is 18 but generally ranges between 17 and 19, using for oneâs population students that go straight to college from high school. For gifted children or adults that never went to college, it can go as low as 12 years of age to as high as human life expectancy.
Five years probably hasn't changed this picture. The average age of a credit union member is 47 - nearly 10 years older than the median age of people in the US (Source: US Census). This older average age means many of their members are past their prime borrowing years. Importantly, over 27% of the US population is under 20 (Source: US Census).