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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Producer gas/water gas generators, with/without their purifiers; acetylene ... | $8,114,913 | $15,556,077 | $7,353,310 | $13,162,739 | $33,291,040 | $36,913,900 | $6,820,611 |
| Parts of the producer gas/water gas generators/acetylene gas & sim. water p ... | $140,778 | $300,905 | $4,416,518 | $2,010,693 | $211,591 | $8,380,641 | $4,013,038 |
| Total | $8,255,691 | $15,856,982 | $11,769,828 | $15,173,432 | $33,502,631 | $45,294,541 | $10,833,649 |
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