William Rosenberg opened the first Dunkin Donuts in 1950 and began franchising in 1955. Dunkin Donuts now has over 11,000 locations worldwide operating on a franchising model. Dunkin Donuts sources coffee beans from South America and has strict requirements for growing conditions like altitude and rainfall. The harvesting, processing, drying and storing of coffee beans follows numerous steps to ensure high quality before the beans are distributed to stores or retailed for home use. Dunkin Donuts has loyal coffee drinking customers and has shifted its focus from doughnuts to coffee, earning 62% of sales from coffee.