Commodity200520062007200820092010
Bitumen & asphalt, nat.; asphaltites & asphaltic rocks$1,566,394$5,139,431$9,602,021$12,603,661$5,358,009$9,945,444
Total$1,566,394$5,139,431$9,602,021$12,603,661$5,358,009$9,945,444