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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Producer gas/water gas generators, with/without their purifiers; acetylene ... | $9,647,000 | $56,754,000 | $11,627,000 | $8,584,000 | $17,017,000 | $21,865,499 | $27,663,515 |
| Parts of the producer gas/water gas generators/acetylene gas & sim. water p ... | $4,083,000 | $22,715,000 | $8,480,000 | $2,925,000 | $2,763,000 | $4,568,119 | $3,989,198 |
| Total | $13,730,000 | $79,469,000 | $20,107,000 | $11,509,000 | $19,780,000 | $26,433,618 | $31,652,713 |
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