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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Petroleum bitumen | $44,223,260 | $43,893,847 | $35,098,182 | $41,523,410 | $25,177,038 | $26,041,990 | $13,232,873 |
| Residues of petroleum oils/oils obt. from bituminous mins., other than petr ... | $1,027,327 | $386,631 | $806,548 | $3,845,320 | $10,848,952 | $787,711 | $9,553,863 |
| Total | $45,250,587 | $44,280,478 | $35,904,730 | $45,368,730 | $36,025,990 | $26,829,701 | $22,786,736 |
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