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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Producer gas/water gas generators, with/without their purifiers; acetylene ... | $6,186,730 | $2,957,560 | $4,538,136 | $3,718,101 | $6,728,351 | $5,185,645 | $5,052,977 |
| Parts of the producer gas/water gas generators/acetylene gas & sim. water p ... | $5,213,192 | $1,431,901 | $428,680 | $2,982,848 | $2,366,194 | $1,386,292 | $447,501 |
| Total | $11,399,922 | $4,389,461 | $4,966,816 | $6,700,949 | $9,094,545 | $6,571,937 | $5,500,478 |
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