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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Producer gas/water gas generators, with/without their purifiers; acetylene ... | $3,491,747 | $1,814,252 | $5,366,150 | $2,358,747 | $1,456,152 | $2,651,920 | $2,295,717 |
| Parts of the producer gas/water gas generators/acetylene gas & sim. water p ... | $31,037 | $37,565 | $224,856 | $30,714 | $11,513 | $6,006 | $4,112 |
| Total | $3,522,784 | $1,851,817 | $5,591,006 | $2,389,461 | $1,467,665 | $2,657,926 | $2,299,829 |
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