The discount warehouse operator continues to reward its customers and shareholders.Costco Wholesale (COST -1.05%) stock has delivered exceptional returns to shareholders over the years. However, its rising share price has brought the stock's dividend yield to its lowest level in over 15 years. Here's how much Costco pays in dividends.Improving sales should keep Costco's dividend growingAs inflation levels off, Costco is seeing stronger discretionary spending in areas like toys, tires, gardening, and health ...