Djibouti's economy is largely concentrated in the service sector. Commercial activities revolve around the country's free trade policies and strategic location as a Red Sea transit point. Due to limited rainfall, vegetables and fruits are the principal production crops, and other food items require importation. The GDP (purchasing power parity) in 2013 was estimated at $2.505 billion, with a real growth rate of 5% annually. Per capita income is around $2,874 (PPP). The services sector constituted around 79.7% of the GDP, followed by industry at 17.3%, and agriculture at 3%.