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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Producer gas/water gas generators, with/without their purifiers; acetylene ... | $11,626,069 | $13,817,733 | $8,803,863 | $11,357,756 | $50,678,425 | $7,820,692 | $11,936,272 |
| Parts of the producer gas/water gas generators/acetylene gas & sim. water p ... | $1,405,840 | $442,642 | $2,261,933 | $3,711,883 | $2,167,477 | $1,556,450 | $2,419,075 |
| Total | $13,031,909 | $14,260,375 | $11,065,796 | $15,069,639 | $52,845,902 | $9,377,142 | $14,355,347 |
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