 U.S. assistance to Angola amounted to US$188 million in 2003, much of it in the field of health services and disease control.USAID's food for peace program gave over US$30 million to Angola's population in 2005.Angola is currently the second biggest trading partner in Sub-Saharan Africa of the U.S., primarily because of oil; Angola produces of oil per day, second only to Nigeria in all of Africa.