Data for 2007 are actual prices and data for 2008 - 2020 are price forecasts.

$ = US dollar; c = US cents; bbl = barrel; cum = cubic meter; dmtu = Dry Metric Ton Unit; kg = kilogram; mmbtu = million British thermal units; mt = metric ton; toz = troy oz. Forecasts were prepared May 14, 2008 - Development Prospects Group, World Bank.