The U.S. Department of Agriculture (USDA) surveys households each year to understand the prevalence of food insecurity across the nation. The USDA defines food insecurity as when households are, at least at some times in a year, unable to acquire adequate food for one or more adults or children in a household because of insufficient money or other resources. At the state level, these USDA data are aggregated into three-year periods to have sufficient data for more reliable estimates. The newest data, covering the years 2019-2021, were released in September 2022.