From 1999–2000 through August 2021–August 2023, the prevalence of obesity among persons in the United States aged 2–19 years increased from 13.9% to 21.1%, and the prevalence of severe obesity increased from 3.6% to 7.0%.
Supplementary Table: https://stacks.cdc.gov/view/cdc/164014
Source: National Center for Health Statistics, National Health and Nutrition Examination Survey, 1999–2000 through August 2021–August 2023. https://www.cdc.gov/nchs/nhanes/index.htm