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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Producer gas/water gas generators, with/without their purifiers; acetylene ... | $5,566,152 | $1,215,743 | $1,427,976 | $511,909 | $9,532,742 | $3,371,705 | $295,230 |
| Parts of the producer gas/water gas generators/acetylene gas & sim. water p ... | $29,657 | $795,950 | $1,319,685 | $1,226,523 | $2,653,515 | $2,660,216 | $558,509 |
| Total | $5,595,809 | $2,011,693 | $2,747,661 | $1,738,432 | $12,186,257 | $6,031,921 | $853,739 |
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