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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $69,643 | $68,677 | $95,641 | $114,800 | $131,515 | $26,042 | $156,353 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $419,159 | $414,204 | $78,531 | $1,059,581 | $708,155 | $247,261 | $575,443 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $20,498 | $11,180 | $1,642 | $1,166,240 | $5,714 | | $12,962 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $306,458 | $109,958 | $64,152 | $85,464 | $398,908 | $94,686 | $170,697 |
| Total | $815,758 | $604,019 | $239,966 | $2,426,085 | $1,244,292 | $367,989 | $915,455 |
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