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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Producer gas/water gas generators, with/without their purifiers; acetylene ... | $29,192,712 | $8,777,395 | $9,079,643 | $10,324,713 | $4,462,910 | $17,206,975 | $25,827,597 |
| Parts of the producer gas/water gas generators/acetylene gas & sim. water p ... | $39,106,779 | $266,983 | $692,780 | $557,174 | $281,597 | $160,705 | $494,293 |
| Total | $68,299,491 | $9,044,378 | $9,772,423 | $10,881,887 | $4,744,507 | $17,367,680 | $26,321,890 |
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