Commodity2005200620072008200920102011
Bitumen & asphalt, nat.; asphaltites & asphaltic rocks$2,803,824$3,848,277$2,050,983$296,041$515,545$96,995$5,994
Total$2,803,824$3,848,277$2,050,983$296,041$515,545$96,995$5,994