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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Producer gas/water gas generators, with/without their purifiers; acetylene ... | $656,571 | $3,481,895 | $955,924 | $678,216 | $370,050 | $72,640 | $165,319 |
| Parts of the producer gas/water gas generators/acetylene gas & sim. water p ... | $2,512,493 | $4,228,856 | $8,130,874 | $6,494,452 | $7,611,307 | $4,032,904 | $3,264,287 |
| Total | $3,169,064 | $7,710,751 | $9,086,798 | $7,172,668 | $7,981,357 | $4,105,544 | $3,429,606 |
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