Commodity2005200620072008200920102011
Bitumen & asphalt, nat.; asphaltites & asphaltic rocks$4,509,553$4,765,627$537,373$308,945$628,469$6,044$1,354,407
Total$4,509,553$4,765,627$537,373$308,945$628,469$6,044$1,354,407