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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Producer gas/water gas generators, with/without their purifiers; acetylene ... | $21,338,037 | $8,171,105 | $16,302,854 | $11,245,676 | $13,207,797 | $9,324,727 | $8,660,233 |
| Parts of the producer gas/water gas generators/acetylene gas & sim. water p ... | $1,101,182 | $1,323,347 | $3,838,953 | $4,673,911 | $1,435,147 | $3,759,051 | $1,831,116 |
| Total | $22,439,219 | $9,494,452 | $20,141,807 | $15,919,587 | $14,642,944 | $13,083,778 | $10,491,349 |
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