The annual foreign exchange earnings from professional services export trade such as education, medical tourism and consultancy services is about five hundred percent higher than the revenue accrued from the Oil and Gas industry. The World Trade Organisation estimates that in 2013 Ghana's total professional services trade accounted for about US$2.5billion; though a marginal fraction of the world total services of US$4.64trillion, it was much higher than the net revenue of the Oil and Gas industry that's hovering around US$500million.