Amazon has topped an annual study of the U.S. grocery market. The online giant placed first in the fourth annual dunnhumby Retailer Preference Index (RPI), a nationwide study that examines the $1 trillion U.S. grocery market.

In a year dominated by COVID-19, Amazon eclipsed last year’s winner H-E-B and runner-up Trader Joe’s to take the top spot as shoppers focused on speed and e-commerce.