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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Producer gas/water gas generators, with/without their purifiers; acetylene ... | $461,808,652 | $16,052,681 | $11,394,282 | $2,707,763 | $12,718,380 | $6,268,113 | $6,364,282 |
| Parts of the producer gas/water gas generators/acetylene gas & sim. water p ... | $3,622,243 | $2,566,998 | $4,005,692 | $1,579,196 | $1,048,302 | $1,415,309 | $742,233 |
| Total | $465,430,895 | $18,619,679 | $15,399,974 | $4,286,959 | $13,766,682 | $7,683,422 | $7,106,515 |
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