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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Producer gas/water gas generators, with/without their purifiers; acetylene ... | $3,481,042 | $4,197,539 | $987,341 | $228,720 | $756,247 | $1,141,050 | $4,720,703 |
| Parts of the producer gas/water gas generators/acetylene gas & sim. water p ... | $1,054,655 | $314,149 | $694,140 | $4,434,192 | $948,373 | $27,377 | $855,594 |
| Total | $4,535,697 | $4,511,688 | $1,681,481 | $4,662,912 | $1,704,620 | $1,168,427 | $5,576,297 |
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