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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Producer gas/water gas generators, with/without their purifiers; acetylene ... | $59,788,952 | $56,339,743 | $62,671,294 | $67,031,766 | $79,627,021 | $65,358,497 | $92,787,533 |
| Parts of the producer gas/water gas generators/acetylene gas & sim. water p ... | $12,933,917 | $13,325,340 | $22,573,571 | $33,906,318 | $51,918,436 | $63,156,370 | $67,504,239 |
| Total | $72,722,869 | $69,665,083 | $85,244,865 | $100,938,084 | $131,545,457 | $128,514,867 | $160,291,772 |
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