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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Producer gas/water gas generators, with/without their purifiers; acetylene ... | $5,749,323 | $5,865,224 | $5,881,385 | $9,929,698 | $10,811,121 | $14,541,046 | $20,184,415 |
| Parts of the producer gas/water gas generators/acetylene gas & sim. water p ... | $2,631,418 | $4,859,525 | $2,093,827 | $3,118,090 | $3,686,463 | $1,465,123 | $3,151,331 |
| Total | $8,380,741 | $10,724,749 | $7,975,212 | $13,047,788 | $14,497,584 | $16,006,169 | $23,335,746 |
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