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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Producer gas/water gas generators, with/without their purifiers; acetylene ... | $17,775,511 | $13,845,670 | $14,267,366 | $13,885,602 | $12,420,474 | $11,205,634 | $17,395,241 |
| Parts of the producer gas/water gas generators/acetylene gas & sim. water p ... | $2,379,818 | $581,573 | $1,415,680 | $3,515,946 | $2,535,825 | $2,069,099 | $3,732,299 |
| Total | $20,155,329 | $14,427,243 | $15,683,046 | $17,401,548 | $14,956,299 | $13,274,733 | $21,127,540 |
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