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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $13,965,569 | $12,476,227 | $14,423,360 | $17,484,649 | $15,553,940 | $16,034,951 | $18,039,657 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $18,211,961 | $22,014,065 | $16,587,137 | $15,550,625 | $13,105,143 | $8,634,356 | $16,293,103 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $67,720 | $201,054 | $1,703,808 | $3,312,411 | $2,326,794 | $1,730,756 | $1,023,093 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $16,765,346 | $15,631,400 | $21,331,418 | $51,801,810 | $22,371,647 | $22,723,904 | $22,713,347 |
| Total | $49,010,596 | $50,322,746 | $54,045,723 | $88,149,495 | $53,357,524 | $49,123,967 | $58,069,200 |
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