At least 30 percent of people in 12 states were obese in 2010, an increase of three states from a year earlier, according to the U.S. Centers for Disease Control and Prevention. No state reported that less than 20 percent of adults were obese, the Atlanta-based agency said today in a statement. That means no state met the national Healthy People 2010 goal to lower the prevalence to 15 percent. The South had the highest rate of obesity, with 29.4 percent, and the West had the lowest, of 24.1 percent, the CDC report said.