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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Producer gas/water gas generators, with/without their purifiers; acetylene ... | $3,564,627 | $3,922,130 | $2,825,902 | $247,371 | $9,960,748 | $635,789 | $5,215,385 |
| Parts of the producer gas/water gas generators/acetylene gas & sim. water p ... | $388,956 | $21,449 | $50,227 | $244,204 | $52,146 | $45,145 | $289,993 |
| Total | $3,953,583 | $3,943,579 | $2,876,129 | $491,575 | $10,012,894 | $680,934 | $5,505,378 |
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