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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Producer gas/water gas generators, with/without their purifiers; acetylene ... | $13,153,307 | $9,347,630 | $17,078,436 | $39,949,561 | $12,738,204 | $16,182,421 | $26,826,988 |
| Parts of the producer gas/water gas generators/acetylene gas & sim. water p ... | $3,767,568 | $1,319,427 | $4,901,890 | $1,705,215 | $1,882,509 | $1,528,228 | $2,280,868 |
| Total | $16,920,875 | $10,667,057 | $21,980,326 | $41,654,776 | $14,620,713 | $17,710,649 | $29,107,856 |
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