Washington ? Adult obesity rates have jumped in 28 states.

The numbers come from a new report, “F as in Fat: How Obesity Threatens America’s Future,” from the Trust for America’s Health and the Robert Wood Johnson Foundation. An average of 2007 to 2009 data showed that 38 states have adult obesity rates above 25 percent. In 1991, no state had an obesity rate above 20 percent.

The report also highlights troubling racial, ethnic and geographic disparities. Adult obesity rates for blacks and Latinos were higher than for whites in at least 40 states and the District of Columbia. Ten of the 11 states with the highest rates of obesity were in the South; Mississippi weighed in with the highest adult rate for the sixth year in a row with 33.8 percent. Adults earning less than $15,000 were also significantly more likely to be obese than those earning $50,000 or more annually.

The report ranks Kansas the 16th most obese state in the country with an adult obesity rate of 28.2 percent.