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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Producer gas/water gas generators, with/without their purifiers; acetylene ... | $15,403,770 | $7,979,514 | $8,116,879 | $14,941,179 | $44,735,826 | $19,834,729 | $14,034,051 |
| Parts of the producer gas/water gas generators/acetylene gas & sim. water p ... | $436,293 | $416,763 | $1,275,075 | $3,266,378 | $1,429,811 | $2,641,829 | $2,429,085 |
| Total | $15,840,063 | $8,396,277 | $9,391,954 | $18,207,557 | $46,165,637 | $22,476,558 | $16,463,136 |
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