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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
| Producer gas/water gas generators, with/without their purifiers; acetylene ... | $2,391,859 | $4,124,427 | $4,059,922 | $2,473,984 | $2,792,536 | $1,752,667 |
| Parts of the producer gas/water gas generators/acetylene gas & sim. water p ... | $4,433,144 | $6,072,946 | $11,131,160 | $10,803,605 | $7,034,346 | $4,495,682 |
| Total | $6,825,003 | $10,197,373 | $15,191,082 | $13,277,589 | $9,826,882 | $6,248,349 |
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