The state health departament says 36 percent of Missourians are fat. The department says lifestyle changes have left too many people with too little time to eat healthy food. The result–a lot of fatty fast food is consumed. The middle-age spread is definitely among us. The department says people 35-to-54 are among those most likely to be overweight or obese. A department telephone survey finds obesity also is a big problem among males, blacks, and low-income individuals.