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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $11,751,968 | $14,916,347 | $10,839,418 | $11,516,665 | $7,300,999 | $9,129,902 | $9,645,568 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $32,227,798 | $37,790,783 | $55,311,491 | $47,237,061 | $40,013,151 | $37,434,457 | $47,030,435 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $12,988,377 | $25,389,526 | $12,741,888 | $13,442,420 | $13,658,884 | $8,864,614 | $9,669,510 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $65,343,663 | $81,007,070 | $88,561,152 | $95,353,698 | $66,071,906 | $78,328,819 | $88,020,739 |
| Total | $122,311,806 | $159,103,726 | $167,453,949 | $167,549,844 | $127,044,940 | $133,757,792 | $154,366,252 |
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