Z Less than 0.05 percent.
1 Estimated.
2 Includes nonfood items.
3 A grocery store, primarily self-service in operation, providinga full range of departments, and having at least $2.5 million inannual sales in 1985 dollars.
4 Contains greater variety of products than conventionalsupermarkets, including specialty and service departments, andconsiderable nonfood (general merchandise) products.
5 Contains limited product variety and fewer services provided,incorporating case lot stocking and shelving practices.
6 Contains a pharmacy, a nonprescription drug department, and agreater variety of health and beauty aids than that carried byconventional supermarkets.
7 A larger warehouse store that offers expanded product varietyand often service meat, deli, or seafood departments.
8 A very large store offering a greater variety of generalmerchandise--like clothes, hardware, and seasonal goods--andpersonal care products than other grocery stores.
9 A small grocery store selling a limited variety of food andnonfood products, typically open extended hours.
10 A grocery store, primarily self-service in operation, selling awide variety of food and nonfood products with annual sales below$2.5 million (1985 dollars).
11 Primarily engaged in the retail sale of a single food categorysuch as meat and seafood stores and retail bakeries.

Source: U.S. Dept. of Agriculture, Economic Research Service,Food Marketing Review, annual.

http://www.ers.usda.gov/Prodsrvs/rept-fd.htm#consumption