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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
| Producer gas/water gas generators, with/without their purifiers; acetylene ... | $1,845,569 | $5,086,254 | $1,223,161 | $1,886,165 | $5,185,513 | $7,094,141 |
| Parts of the producer gas/water gas generators/acetylene gas & sim. water p ... | $592,907 | $1,661,011 | $3,355,699 | $4,302,675 | $5,195,067 | $4,777,856 |
| Total | $2,438,476 | $6,747,265 | $4,578,860 | $6,188,840 | $10,380,580 | $11,871,997 |
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