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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Producer gas/water gas generators, with/without their purifiers; acetylene ... | $4,616,250 | $5,889,965 | $5,016,068 | $4,662,739 | $2,257,022 | $21,021,060 | $16,332,341 |
| Parts of the producer gas/water gas generators/acetylene gas & sim. water p ... | $120,158 | $172,696 | $3,175,297 | $2,634,251 | $1,922,047 | $1,666,407 | $2,291,221 |
| Total | $4,736,408 | $6,062,661 | $8,191,365 | $7,296,990 | $4,179,069 | $22,687,467 | $18,623,562 |
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