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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Producer gas/water gas generators, with/without their purifiers; acetylene ... | $512,033 | $3,855,634 | $7,162 | $19,614 | $1,652,095 | $1,637,418 | $9,581,463 |
| Parts of the producer gas/water gas generators/acetylene gas & sim. water p ... | $48,395 | $1,786 | $169,435 | $2,290,501 | $40,914 | $5,907 | $7,804 |
| Total | $560,428 | $3,857,420 | $176,597 | $2,310,115 | $1,693,009 | $1,643,325 | $9,589,267 |
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