This survey depicts the levels of obesity in the United States, with a breakdown by age, in t he period between January 2010 and May 2012. Some 9.5 percent of those aged 18-24 fall into the category of obese class I.
Percentage of U.S. adults who are obese 2010-2012, by age
The World Health Organization defines a normal Body Mass Index (BMI) range as being 18.50 to 24.99. It labels BMIs of 25.00 to less than 30.00 as overweight/pre-obese. BMIs of 30.00 or higher fall into one of three
classes of obesity:
Obese class I = 30.00 to 34.99
Obese class II = 35.00 to 39.99
Obese class III = 40.00 or higher