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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $2,912,911 | $6,512,493 | $3,406,521 | $6,613,074 | $4,292,978 | $2,444,746 | $2,774,171 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $20,822,686 | $16,112,207 | $20,650,381 | $12,204,106 | $8,913,947 | $8,259,456 | $7,338,668 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $60,437 | $165,433 | $5,234,026 | $6,627,495 | $1,949,099 | $382,186 | $4,017,368 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $10,478,048 | $8,794,413 | $15,446,498 | $11,006,313 | $5,446,364 | $5,004,052 | $8,610,886 |
| Total | $34,274,082 | $31,584,546 | $44,737,426 | $36,450,988 | $20,602,388 | $16,090,440 | $22,741,093 |
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