- More than 30% of Americans said they were obese in 2015, compared with 19% in 1997
- Obesity rates were highest among middle-aged adults and blacks
- In other measures of health, Americans are doing better than they have in decades
(CNN)The results are in from the one of the largest and broadest surveys of health in the United States. And although many of the findings are encouraging -- more Americans had health insurance and fewer smoked cigarettes in 2015 than in previous years -- the gains were overshadowed by rising rates of obesity and diabetes.