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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Producer gas/water gas generators, with/without their purifiers; acetylene ... | $721,430 | $1,851,829 | $8,153,435 | $3,203,936 | $8,636,485 | $2,407,771 | $14,294,940 |
| Parts of the producer gas/water gas generators/acetylene gas & sim. water p ... | $132,930 | $468,074 | $624,017 | $206,750 | $6,458,415 | $185,149 | $10,228,887 |
| Total | $854,360 | $2,319,903 | $8,777,452 | $3,410,686 | $15,094,900 | $2,592,920 | $24,523,827 |
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