Source: U.S. Census Bureau  

Release: Income and Poverty in the United States  

Units:  Thousands of Persons, Not Seasonally Adjusted

Frequency:  Annual

Population as of March of the following year. Information on confidentiality protection, sampling error, nonsampling error, and definitions is available at https://www2.census.gov/programs-surveys/cps/techdocs/cpsmar23.pdf