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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Producer gas/water gas generators, with/without their purifiers; acetylene ... | $2,319,506 | $8,521,732 | $10,655,668 | $19,153,818 | $13,174,635 | $24,474,502 | $19,399,586 |
| Parts of the producer gas/water gas generators/acetylene gas & sim. water p ... | $3,176,119 | $7,431,225 | $13,025,951 | $18,162,958 | $10,009,527 | $18,649,361 | $11,994,872 |
| Total | $5,495,625 | $15,952,957 | $23,681,619 | $37,316,776 | $23,184,162 | $43,123,863 | $31,394,458 |
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