|
| Commodity | 2005 | 2008 | 2009 | 2010 | 2011 |
| Bituminous/oil shale & tar sands | $137,398 | | $1,379,045 | $3,307,400 | $928,520 |
| Bitumen & asphalt, nat.; asphaltites & asphaltic rocks | | $22,156 | $345,145 | $126,428 | $28,141 |
| Total | $137,398 | $22,156 | $1,724,190 | $3,433,828 | $956,661 |
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