Based on the National Health Interview Survey from 2021, 3.8% of adults aged 18 years and older experienced serious psychological distress during the past 30 days.
FPL is the federal poverty level, which changes depending on how many individuals are within a single household. The link below contains more information for 2021 FPL. In this figure, when the x-axis on the graph is labelled as "<100" this means that those individuals are less than 100% of the FPL, 100-199 is 100%-199% of FPL, 200%-399 is 200%-399% of FPL, and >400 is more than 400% of FPL.
Joy, J., Alfier, J.M., and Kandi, D. (2023). Age-Adjusted Percentage of Adults Aged > 18 Years with Serious Psychological Distress During the Past 30 Days, by Family Income - National Health Interview Survey, 2021. Morbidity and Mortality Weekly Report, 72(12): 325. cdc.gov/mmwr/volumes/72/wr/mm7212a5.htm?s_cid=mm7212a5_w