The document shows maps of the United States from 1990, 2000, and 2010 that track obesity trends among U.S. adults using data from the Behavioral Risk Factor Surveillance System. The maps reveal that between 1990 and 2010, the percentage of the adult population with a body mass index of 30 or higher, classified as obese, increased in most states from below 20% to over 30% in many states, indicating a dramatic nationwide rise in obesity over the 20-year period.