|
| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
| Bituminous/oil shale & tar sands | | | $227,280 | $91 | | |
| Bitumen & asphalt, nat.; asphaltites & asphaltic rocks | $4,614,422 | $2,496,406 | $288,146 | $537,117 | $2,349,493 | $1,970,728 |
| Total | $4,614,422 | $2,496,406 | $515,426 | $537,208 | $2,349,493 | $1,970,728 |
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