For May, U.S. chain store sales increased 3% on a year-over-year, same-store basis, according to ICSC's index. Wholesale club sales were up 4.6% for the month, excluding fuel sales. Drug stores were up 3.2% and discounters saw sales jump 3% in May. Apparel specialty stores reported an average 6.5% decline in same-store sales and department stores reporting an average 3.5% drop in sales.