The real estate boom described in our cover story has many causes, none more attention-getting than in-migration that has occurred in recent years. Over the course of the first decade of the century, about 4.1 million Americans moved to Texas, and about 3.3 million left Texas for other states, adding up to a net gain of about 800,000 people. Where are they coming from? Glad you asked.

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Infographic by Jeff Salamon. Click to enlarge.