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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Producer gas/water gas generators, with/without their purifiers; acetylene ... | $23,656 | $6,179,098 | $63,040,261 | $25,987 | $482,849 | $8,093,386 | $16,213,242 |
| Parts of the producer gas/water gas generators/acetylene gas & sim. water p ... | $247,383 | $69,226 | $105,481 | $206,889 | $2,435 | $25,193 | $183,572 |
| Total | $271,039 | $6,248,324 | $63,145,742 | $232,876 | $485,284 | $8,118,579 | $16,396,814 |
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