Sunshine Juices sold $16.2 million in the U.S. pomegranate juice drink market last year, but the 8.9 million customers who bought from Sunshine Juices spent a total of $38.7 million in this market. Across the whole marketplace, 69.8 million buyers contributed to total industry sales of $177.1 million of pomegranate juice drinks. Calculate usage index for Sunshine Juices' customers in the U.S. pomegranate juice drink market. Report your answer as a percent, and round your answer to the nearest tenth of a percent. Report 27.5%, for example, as "27.5".