Over the past two and a half decades, U.S. households in the lowest
income quintile (the poorest 20 percent of households) spent between
28.8 and 42.6 percent of their annual before-tax income on food,
compared with 6.5 to 9.2 percent spent by households in the highest
income quintile. Before-tax income includes earnings and other money
income, public assistance, Supplemental Security Income payments, and
Supplemental Nutrition Assistance Program (SNAP) benefits.

https://www.ers.usda.gov/amber-waves/2016/september/percent-of-income-spent-on-food-falls-as-income-rises/

========================

==============