About two thirds of the state's GDP is from commerce and services which include transportation and storage, mostly linked with the Manzanillo port. Economic growth associated with the port continues to grow by double digits. Most commercial activity in general is concentrated in the cities of Colima, Tecomán and Manzanillo, which have the most developed communications, transportation and other infrastructure. The main distribution center is the city of Colima handing both basic commodities and industrial and other commercial merchandise for the rest of the state. Just under 95% of Colima's commercial enterprises are retail outlets with 5.6% involved in wholesale. Only three percent of these enterprises are modern facilities with twenty-one traditional markets, forty-five major tianguis and numerous corner stores still dominating the state. Commercial sales increase by about five percent per year.