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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Producer gas/water gas generators, with/without their purifiers; acetylene ... | $5,520,351 | $4,423,579 | $3,892,297 | $6,924,749 | $3,467,931 | $3,046,774 | $1,096,514 |
| Parts of the producer gas/water gas generators/acetylene gas & sim. water p ... | $401,099 | $947,359 | $787,282 | $4,435,472 | $2,992,361 | $1,175,343 | $2,186,864 |
| Total | $5,921,450 | $5,370,938 | $4,679,579 | $11,360,221 | $6,460,292 | $4,222,117 | $3,283,378 |
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