As defined by the Census bureau. https://www.census.gov/data/tables/time-series/demo/income-poverty/historical-poverty-people.html https://www.census.gov/data/

As defined by the Census bureau. https://www.census.gov/data/tables/time-series/demo/income-poverty/historical-poverty-people.html https://www.census.gov/data/tables/time-series/demo/income-p... There's a link below the tables to a PDF that describes the definitions and methods used.