NACS was founded August 14, 1961, as the National Association of Convenience Stores. It is an international trade association representing more than 2,100 retail and 1,600 supplier company members. NACS member companies do business in nearly 50 countries worldwide, with the majority of members based in the United States. The U.S. convenience store industry, with 154,195 stores (as of December 31, 2015) across the country, posted $547.8 billion in total sales in 2015. The convenience retailing industry continues to be dominated by single-store operators, which account for 63.1% of all convenience stores (97,359 stores total).