Just a brief post while I gather more data for analysis. North Dakota is getting younger. Since 2010 the median age of a North Dakotan declined by 2 full years.
This is a major age decline, and for a population that not too long ago was graying faster than the nation as a whole. Normally you would expect to see a massive increase in births or a massive decline in older ages due to mortality to effect this kind of change. We have seen a massive increase in in-migration into North Dakota as a result of the oil industry.
Will this continue with oil prices declining and increased productivity out of the oil patch? That will be interesting to watch and see.