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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
| Producer gas/water gas generators, with/without their purifiers; acetylene ... | $1,065,929 | $2,241,579 | $19,647,669 | $14,324,997 | $10,199,910 | $3,495,986 |
| Parts of the producer gas/water gas generators/acetylene gas & sim. water p ... | $5,035,564 | $88,188 | $227,924 | $1,159,548 | $264,074 | $3,278,752 |
| Total | $6,101,493 | $2,329,767 | $19,875,593 | $15,484,545 | $10,463,984 | $6,774,738 |
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