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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Producer gas/water gas generators, with/without their purifiers; acetylene ... | $7,943,243 | $6,459,982 | $11,323,386 | $20,740,134 | $12,348,321 | $13,112,447 | $14,342,963 |
| Parts of the producer gas/water gas generators/acetylene gas & sim. water p ... | $5,657,570 | $7,575,980 | $6,323,093 | $12,528,162 | $5,787,928 | $9,594,409 | $5,590,263 |
| Total | $13,600,813 | $14,035,962 | $17,646,479 | $33,268,296 | $18,136,249 | $22,706,856 | $19,933,226 |
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