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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Producer gas/water gas generators, with/without their purifiers; acetylene ... | $140,200 | $1,268,800 | $1,392,400 | $3,546,300 | $4,292,800 | $2,700,700 | $1,428,200 |
| Parts of the producer gas/water gas generators/acetylene gas & sim. water p ... | $45,200 | $26,600 | $800 | $249,700 | $584,400 | $47,800 | $37,500 |
| Total | $185,400 | $1,295,400 | $1,393,200 | $3,796,000 | $4,877,200 | $2,748,500 | $1,465,700 |
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