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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Producer gas/water gas generators, with/without their purifiers; acetylene ... | $203,266 | $322,771 | $889,447 | $1,148,077 | $1,680,908 | $790,233 | $455,099 |
| Parts of the producer gas/water gas generators/acetylene gas & sim. water p ... | $354,222 | $778,378 | $33,481 | $639,850 | $746,307 | $32,237 | $229,787 |
| Total | $557,488 | $1,101,149 | $922,928 | $1,787,927 | $2,427,215 | $822,470 | $684,886 |
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