But in not including stores under development, Amazon is removing some level of transparency into how quickly it's building up new space for physical stores. Whole Foods announced at least 25 new location openings last year, while the number of Go stores increased to 10 across Seattle, Chicago and San Francisco. Amazon also launched three new 4-star stores, which sell an assortment of products with at least a 4-star rating on Amazon.
Amazon is expected to double down on physical store growth this year. It's planning an expansion for Whole Foods stores, primarily targeting suburbs and more rural areas like Idaho and Wyoming, the Wall Street Journal reported in December. And Bloomberg reported in September that the company is considering opening up to 3,000 Amazon Go stores by 2021.
Amazon's physical store footprint isn't the only number that dropped due to an accounting change last year.
The company said during its fourth-quarter earnings call that a 3 percent decline in physical store revenue was largely caused by a change in how it accounted for calendar days following the Whole Foods acquisition, and a shift in delivery and pick-up orders to the online sales component of revenue. Adjusting for those changes, physical store revenue would have grown 6 percent, Amazon said.
WATCH: Amazon is expanding Go footprint after one year in business