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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Producer gas/water gas generators, with/without their purifiers; acetylene ... | $242,089 | $173,955 | $1,252,169 | $1,145,689 | $1,053,408 | $604,565 | $1,218,998 |
| Parts of the producer gas/water gas generators/acetylene gas & sim. water p ... | $239,197 | $739,613 | $1,452,050 | $13,858 | $10,218 | $58,885 | $15,201 |
| Total | $481,286 | $913,568 | $2,704,219 | $1,159,547 | $1,063,626 | $663,450 | $1,234,199 |
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