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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Producer gas/water gas generators, with/without their purifiers; acetylene ... | $15,639,967 | $14,302,182 | $24,344,327 | $41,811,291 | $23,764,405 | $19,774,652 | $37,465,982 |
| Parts of the producer gas/water gas generators/acetylene gas & sim. water p ... | $2,962,654 | $8,719,210 | $11,184,799 | $16,962,162 | $11,219,203 | $7,409,942 | $5,279,108 |
| Total | $18,602,621 | $23,021,392 | $35,529,126 | $58,773,453 | $34,983,608 | $27,184,594 | $42,745,090 |
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