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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Producer gas/water gas generators, with/without their purifiers; acetylene ... | $16,011,240 | $18,374,243 | $20,699,903 | $26,245,652 | $13,217,414 | $21,865,832 | $6,925,677 |
| Parts of the producer gas/water gas generators/acetylene gas & sim. water p ... | $2,793,615 | $1,502,679 | $1,923,399 | $1,807,369 | $2,154,917 | $2,511,258 | $274,912 |
| Total | $18,804,855 | $19,876,922 | $22,623,302 | $28,053,021 | $15,372,331 | $24,377,090 | $7,200,589 |
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