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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Producer gas/water gas generators, with/without their purifiers; acetylene ... | $18,460,206 | $20,006,996 | $24,854,107 | $16,896,989 | $36,644,905 | $7,392,165 | $11,364,506 |
| Parts of the producer gas/water gas generators/acetylene gas & sim. water p ... | $7,419,719 | $5,801,558 | $6,643,557 | $16,339,027 | $3,656,488 | $7,118,935 | $4,939,794 |
| Total | $25,879,925 | $25,808,554 | $31,497,664 | $33,236,016 | $40,301,393 | $14,511,100 | $16,304,300 |
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