Food Spending in American Households, 2003-2004
U.S. Economic Research Service, U.S. Department of Agriculture.
Available online.
"Food spending is one measure of household well-being. To assess that measure, USDA periodically publishes information on nationwide food expenditures, with data presented by selected demographic and socioeconomic characteristics... USDA tabulations are based on the most recent and comprehensive data available on at-home and away-from-home food spending by U.S. urban households."