Poll results: 'At which store did your household buy most of its groceries in the past 7 days?'

Assuming a base population of 3.7 million households, Nielsen conducted a phone survey between March 2021 and March 2022 of a representative sample of 3,667 residents aged 18 and older in a nine-county Chicago area (Cook, DuPage, Lake, Kane, Kendall, McHenry and Will in Illinois, and Lake and Porter in Indiana).