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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Producer gas/water gas generators, with/without their purifiers; acetylene ... | $26,388,874 | $46,463,252 | $88,821,717 | $58,498,730 | $81,341,020 | $103,830,315 | $119,959,800 |
| Parts of the producer gas/water gas generators/acetylene gas & sim. water p ... | $4,998,994 | $4,732,479 | $7,337,066 | $7,849,650 | $11,661,036 | $20,253,970 | $16,459,484 |
| Total | $31,387,868 | $51,195,731 | $96,158,783 | $66,348,380 | $93,002,056 | $124,084,285 | $136,419,284 |
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