|
| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Bituminous/oil shale & tar sands | $14,173,187 | $4,375,097 | $10,329,679 | $7,372,130 | $8,723,312 | $10,964,129 | $18,884,073 |
| Bitumen & asphalt, nat.; asphaltites & asphaltic rocks | $4,303,138 | $2,877,361 | $14,654,064 | $38,820,936 | $35,808,596 | $39,518,848 | $37,800,440 |
| Total | $18,476,325 | $7,252,458 | $24,983,743 | $46,193,066 | $44,531,908 | $50,482,977 | $56,684,513 |
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