Commodity2005200620072008
Bituminous/oil shale & tar sands$2,884,982$1,914,240$936,232$249,478
Bitumen & asphalt, nat.; asphaltites & asphaltic rocks$1,680,407$1,420,822$748,050$4,361,036
Total$4,565,389$3,335,062$1,684,282$4,610,514