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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Producer gas/water gas generators, with/without their purifiers; acetylene ... | $3,748,652 | $1,296,600 | $912,890 | $1,096,548 | $309,790 | $2,433,306 | $1,234,079 |
| Parts of the producer gas/water gas generators/acetylene gas & sim. water p ... | $4,642 | $18,217 | $272,672 | $261,143 | $540,200 | $383 | $4,316 |
| Total | $3,753,294 | $1,314,817 | $1,185,562 | $1,357,691 | $849,990 | $2,433,689 | $1,238,395 |
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