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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Producer gas/water gas generators, with/without their purifiers; acetylene ... | $3,103,761 | $2,127,648 | $33,503,338 | $5,002,874 | $6,648,614 | $2,595,086 | $4,695,194 |
| Parts of the producer gas/water gas generators/acetylene gas & sim. water p ... | $146,562 | $288,184 | $291,354 | $4,233,093 | $1,804,457 | $2,033,574 | $7,584,784 |
| Total | $3,250,323 | $2,415,832 | $33,794,692 | $9,235,967 | $8,453,071 | $4,628,660 | $12,279,978 |
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