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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $5,984,662 | $4,329,081 | $9,632,663 | $5,990,968 | $8,543,272 | $5,380,376 | $7,583,100 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $12,144,938 | $10,746,253 | $19,163,761 | $14,554,269 | $20,656,492 | $27,279,515 | $30,287,019 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $2,152,908 | $507,496 | $1,874,854 | $1,211,069 | $2,960,428 | $15,087,641 | $11,386,273 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $10,542,033 | $14,151,537 | $16,120,124 | $14,649,013 | $23,790,061 | $108,969,212 | $194,942,166 |
| Total | $30,824,541 | $29,734,367 | $46,791,402 | $36,405,319 | $55,950,253 | $156,716,744 | $244,198,558 |
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