What percentage of 2017 income was spent on food (all food)

according to this site

https://www.ers.usda.gov/data-products/ag-and-food-statistics-charting-the-essentials/food-prices-and-spending/

households in the middle income quintile spent an average of $7,061 on food, representing 14.3 percent of income, while the lowest income households spent $4,070 on food, representing 34.1 percent of income.