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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $1,946,916 | $2,278,507 | $1,533,234 | $2,245,762 | $1,571,107 | $1,086,612 | $625,669 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $6,417,691 | $8,979,003 | $10,132,004 | $7,141,688 | $6,741,134 | $4,775,151 | $6,378,420 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $126,789 | $271,740 | $236,413 | $114,822 | $376,769 | $1,398,456 | $1,890,733 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $7,919,915 | $11,879,917 | $9,129,391 | $11,686,291 | $12,206,813 | $10,570,895 | $11,217,446 |
| Total | $16,411,311 | $23,409,167 | $21,031,042 | $21,188,563 | $20,895,823 | $17,831,114 | $20,112,268 |
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