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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Producer gas/water gas generators, with/without their purifiers; acetylene ... | $23,383,757 | $26,531,985 | $47,602,919 | $47,975,052 | $51,154,782 | $20,806,562 | $25,014,951 |
| Parts of the producer gas/water gas generators/acetylene gas & sim. water p ... | $4,161,021 | $5,259,853 | $5,947,533 | $11,766,933 | $12,807,937 | $3,221,869 | $11,125,082 |
| Total | $27,544,778 | $31,791,838 | $53,550,452 | $59,741,985 | $63,962,719 | $24,028,431 | $36,140,033 |
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