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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
| Producer gas/water gas generators, with/without their purifiers; acetylene ... | $16,797,086 | $5,754,054 | $25,195,751 | $4,843,921 | $3,785,253 | $4,994,892 |
| Parts of the producer gas/water gas generators/acetylene gas & sim. water p ... | $2,977,976 | $16,474,334 | $7,398,895 | $10,555,421 | $2,293,402 | $735,189 |
| Total | $19,775,062 | $22,228,388 | $32,594,646 | $15,399,342 | $6,078,655 | $5,730,081 |
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