In-store sales for convenience stores are trending upward in 2017, a report released Wednesday by the National Association of Convenience Stores (NACS) found. The strength—mainly the result of a rise in food sales—has generated optimism throughout the industry.

The NACS Retailer Sentiment Survey, which polled 90 domestic companies and their network of 1,778 stores, found that 60% of convenience stores experienced higher in-store sales over the first nine months of 2017 than during the same period of 2016.

Only 20% reported lower numbers during this stretch.

“While retailers attributed several reasons for both strong sales and optimism, an increased emphasis on fresh food sales was most often cited,” read a…