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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Producer gas/water gas generators, with/without their purifiers; acetylene ... | $56,315,328 | $103,984,149 | $85,148,311 | $85,132,450 | $115,431,162 | $27,420,463 | $20,227,910 |
| Parts of the producer gas/water gas generators/acetylene gas & sim. water p ... | $21,097,984 | $26,406,370 | $31,460,248 | $39,040,377 | $1,733,485 | $5,611,460 | $9,478,773 |
| Total | $77,413,312 | $130,390,519 | $116,608,559 | $124,172,827 | $117,164,647 | $33,031,923 | $29,706,683 |
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