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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Producer gas/water gas generators, with/without their purifiers; acetylene ... | $24,520,614 | $23,176,335 | $28,088,007 | $37,767,162 | $9,746,502 | $8,989,088 | $26,418,777 |
| Parts of the producer gas/water gas generators/acetylene gas & sim. water p ... | $4,765,278 | $1,720,000 | $6,235,662 | $2,686,459 | $5,544,671 | $1,896,763 | $1,538,057 |
| Total | $29,285,892 | $24,896,335 | $34,323,669 | $40,453,621 | $15,291,173 | $10,885,851 | $27,956,834 |
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