County to County map shows migrations in and out of a county you select.
Here is my county: Fairfield County Connecticut.
Can you say RETIREES MOVING TO FLORIDA?
And do you see the younger people moving to many other places to work? This is an expensive county and college grads really can't afford to live on their own here. This is a transient area and other working people move in and out to go elsewhere for employment.
Hat Tip: Why Homeschool