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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Producer gas/water gas generators, with/without their purifiers; acetylene ... | $75,320,640 | $94,043,715 | $129,685,887 | $148,122,480 | $162,543,923 | $60,643,706 | $67,314,456 |
| Parts of the producer gas/water gas generators/acetylene gas & sim. water p ... | $14,063,673 | $13,818,786 | $22,042,054 | $38,335,443 | $35,541,278 | $21,931,128 | $11,848,454 |
| Total | $89,384,313 | $107,862,501 | $151,727,941 | $186,457,923 | $198,085,201 | $82,574,834 | $79,162,910 |
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