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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Producer gas/water gas generators, with/without their purifiers; acetylene ... | $721,468 | $1,112,961 | $9,028,445 | $1,397,817 | $6,123,900 | $5,306,987 | $5,228,882 |
| Parts of the producer gas/water gas generators/acetylene gas & sim. water p ... | $78,897 | $77,643 | $78,570 | $114,747 | $1,679,456 | $702,366 | $405,761 |
| Total | $800,365 | $1,190,604 | $9,107,015 | $1,512,564 | $7,803,356 | $6,009,353 | $5,634,643 |
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