|
| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Bituminous/oil shale & tar sands | $1,139,903 | $1,832,090 | $1,803,420 | $954,715 | $667,753 | $122,063 | $180,976 |
| Bitumen & asphalt, nat.; asphaltites & asphaltic rocks | $2,596,053 | $3,878,508 | $8,698,436 | $5,750,820 | $2,759,400 | $2,607,480 | $3,381,198 |
| Total | $3,735,956 | $5,710,598 | $10,501,856 | $6,705,535 | $3,427,153 | $2,729,543 | $3,562,174 |
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