Edit:
What is your 8% source? 12.8% according to the USDA.
https://www.aecf.org/blog/exploring-americas-food-deserts
Edit: Looks like the AECF link might've been edited as the Google preview said 8% - indeed is 12% on the same link. USDA says 10%: https://www.usda.gov/media/blog/2011/05/03/interactive-web-t...