https://www.cdc.gov/nchs/pressroom/videos/2021/september2021/fof_Sept2021.htm
Source: National Hospital Ambulatory Medical Care Survey
https://www.cdc.gov/nchs/data/nhamcs/web_tables/2014_ed_web_tables.pdf
https://www.cdc.gov/nchs/pressroom/videos/2017/november2017/FOFNovember2017.htm
Source: National Health and Nutrition Examination Survey
Source: National Health Interview Survey, 2015
https://ftp.cdc.gov/pub/Health_Statistics/NCHS/NHIS/SHS/2015_SHS_Table_C-6.pdf