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Costco is the nation's third-largest retailer, behind only Walmart and Kroger in sales, according to the National Retail Federation. The company's net sales topped a whopping $116 billion in 2016, up nearly $20 billion in just four years. But those aren't the only impressive numbers associated with everybody's favorite warehouse club. From rotisserie chickens to giant stuffed bears, there are plenty of eye-popping facts and figures about Costco.