Located in Iowa City, Iowa, the United States Postal Service is a delivery service that reaches approximately 150 million residences, businesses and post office boxes. The postal service receives no tax dollars for operating expenses, and relies on the sale of postage, products and services to fund its operations. It operates more than 32,000 retail locations and delivers over 40 percent of the world s mail. Black Enterprise and Hispanic Business magazines ranked the United States Postal Service as a leader in workforce diversity. In addition, the Ponemon Institute, named the postal service as the Most Trusted Government Agency six consecutive years and the sixth Most Trusted Business in the United States.