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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Producer gas/water gas generators, with/without their purifiers; acetylene ... | $7,705,436 | $4,825,314 | $12,731,408 | $18,310,221 | $6,235,430 | $8,950,067 | $5,048,345 |
| Parts of the producer gas/water gas generators/acetylene gas & sim. water p ... | $11,335 | $609,498 | $2,563,466 | $343,540 | $27,710 | $147,017 | $273,802 |
| Total | $7,716,771 | $5,434,812 | $15,294,874 | $18,653,761 | $6,263,140 | $9,097,084 | $5,322,147 |
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