So Marion Local has a student newspaper called the Gold Standard. At the end of each year their final edition is dedicated to the seniors. One of the things they do is find the kids who started kindergarten at Marion Local and moved away at some point to another school. It's usually a TOTAL of 4-5 kids.I would imagine most if not all MAC communities have very little in the way of transient populations. Meaning the kids and families aren't coming and going like you see in Urban and Suburban communities. Helps if you go to school with the same people beginning in K all the way to and including HS. Small communities just like small school watch out for each others kids as well. Difficult to skip practice or misbehave if the random grandmother down the street knows you're suppose to be at practice and calls coach on her own.
MAC communities also foster a safe stable environment for their grads to come back to. Went to school at UT with a good many kids from St. Henry, Delphos, Coldwater, etc.... who had no issue moving back home after graduating college. For some populations moving back home after college is seen as a let down in life. For MAC kids is an honor of sorts to continue to live where you grew up. In those communities there is still tons of pride in where you came from.
Meanwhile, my school published kindergarten pictures of last year's graduating class. Of the 101 kids pictured in the kindergarten pictures, only 52 were there as seniors.