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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Producer gas/water gas generators, with/without their purifiers; acetylene ... | $29,332,979 | $30,101,741 | $32,844,440 | $62,457,632 | $26,357,468 | $23,202,204 | $26,730,349 |
| Parts of the producer gas/water gas generators/acetylene gas & sim. water p ... | $8,884,622 | $15,978,241 | $14,300,476 | $3,707,532 | $4,826,252 | $5,360,697 | $4,524,707 |
| Total | $38,217,601 | $46,079,982 | $47,144,916 | $66,165,164 | $31,183,720 | $28,562,901 | $31,255,056 |
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