The United States represents the primary source of income for Amazon. However, Amazon is expanding globally. Net sales have increased since 2014. In 2016 products represented almost 70% of total sales. Services sales have been growing at a fast pace. In terms of Operating Income, the growth has been mainly driven by the high margins deriving from the services sales. By looking more in-depth at the revenue sources, subscription and AWS services have been growing. That denotes how Amazon is expanding globally by moving more and more toward services (like Prime subscription and AWS).