How does obesity break down by age?

Generally, older children (school age and teens) are at greatest risk for becoming obese. According to the latest National Health and Nutrition Examination Survey (NHANES) from 2007-2008, the prevalence of obesity among U.S. children and adolescence is as follows:

Age (yrs) % Obese
All (2-19) 16.9
2-5 10.4
6-11 19.6
12-19 18.1

When we compare these rates to obesity rates in 1980: 6.5% (6-11 year olds) and 5% (12-19 year olds), we can see that the rate of obesity has tripled in the last 30 years.