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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $1,679,308 | $1,891,374 | $1,750,378 | $808,423 | $2,539,123 | $2,033,515 | $2,393,110 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $925,448 | $1,512,407 | $4,395,423 | $6,866,392 | $11,192,635 | $8,631,759 | $6,762,217 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $4,400,576 | $9,790,366 | $7,274,226 | $13,580,460 | $14,318,873 | $12,493,878 | $14,697,809 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $39,626,023 | $68,297,383 | $87,128,778 | $62,544,993 | $41,785,267 | $42,839,852 | $42,440,554 |
| Total | $46,631,355 | $81,491,530 | $100,548,805 | $83,800,268 | $69,835,898 | $65,999,004 | $66,293,690 |
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