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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $806,354 | $437,239 | $1,123,954 | $820,240 | $812,899 | $332,496 | $1,167,013 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $24,788,541 | $23,984,164 | $27,094,710 | $32,271,084 | $27,173,072 | $17,505,522 | $21,695,176 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $98,332 | $231,275 | $108,543 | $3,059,362 | $173,666 | $64,804 | $2,859,348 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $9,068,343 | $6,681,653 | $15,501,650 | $38,827,440 | $14,084,102 | $18,433,086 | $15,817,885 |
| Total | $34,761,570 | $31,334,331 | $43,828,857 | $74,978,126 | $42,243,739 | $36,335,908 | $41,539,422 |
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