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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Producer gas/water gas generators, with/without their purifiers; acetylene ... | $1,246,453 | $2,174,920 | $1,467,678 | $2,225,998 | $5,583,000 | $7,429,551 | $3,210,994 |
| Parts of the producer gas/water gas generators/acetylene gas & sim. water p ... | $249,600 | $543,246 | $2,229,757 | $557,154 | $3,338,949 | $642,635 | $461,518 |
| Total | $1,496,053 | $2,718,166 | $3,697,435 | $2,783,152 | $8,921,949 | $8,072,186 | $3,672,512 |
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