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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Producer gas/water gas generators, with/without their purifiers; acetylene ... | $10,457,553 | $35,673,731 | $4,950,382 | $2,642,697 | $133,607 | $1,160,457 | $1,533,964 |
| Parts of the producer gas/water gas generators/acetylene gas & sim. water p ... | $36,277 | $1,565,873 | $191,916 | $1,073,352 | $12,101,004 | $7,895,591 | $598,775 |
| Total | $10,493,830 | $37,239,604 | $5,142,298 | $3,716,049 | $12,234,611 | $9,056,048 | $2,132,739 |
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