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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Producer gas/water gas generators, with/without their purifiers; acetylene ... | $2,182,977 | $13,146,270 | $15,128,770 | $22,625,268 | $7,346,636 | $4,948,347 | $7,123,143 |
| Parts of the producer gas/water gas generators/acetylene gas & sim. water p ... | $159,946 | $983,608 | $471,202 | $2,507,746 | $478,874 | $2,266,769 | $242,726 |
| Total | $2,342,923 | $14,129,878 | $15,599,972 | $25,133,014 | $7,825,510 | $7,215,116 | $7,365,869 |
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