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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Producer gas/water gas generators, with/without their purifiers; acetylene ... | $286,902 | $422,688 | $1,143,759 | $61,509,710 | $2,605,666 | $1,355,109 | $398,245 |
| Parts of the producer gas/water gas generators/acetylene gas & sim. water p ... | $36,613 | $39,624 | $1,894,362 | $501,130 | $120,777 | $68,566 | $336,992 |
| Total | $323,515 | $462,312 | $3,038,121 | $62,010,840 | $2,726,443 | $1,423,675 | $735,237 |
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