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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Producer gas/water gas generators, with/without their purifiers; acetylene ... | $9,363,683 | $32,350,467 | $52,543,130 | $59,645,128 | $101,770,131 | $15,191,124 | $21,995,557 |
| Parts of the producer gas/water gas generators/acetylene gas & sim. water p ... | $2,794,540 | $30,824,711 | $9,449,554 | $12,000,791 | $9,014,728 | $11,472,772 | $8,355,537 |
| Total | $12,158,223 | $63,175,178 | $61,992,684 | $71,645,919 | $110,784,859 | $26,663,896 | $30,351,094 |
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