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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $418,229 | $269,831 | $189,981 | $46,138 | $980,822 | $953,962 | $117,805 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $295,007 | $748,667 | $1,182,004 | $1,033,038 | $1,107,450 | $1,076,157 | $1,070,414 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $103,079 | | $6,081 | $39,131 | $1,422,214 | $1,594,911 | $197,783 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $871,628 | $958,155 | $1,292,013 | $2,283,794 | $2,482,996 | $2,122,713 | $1,951,220 |
| Total | $1,687,943 | $1,976,653 | $2,670,079 | $3,402,101 | $5,993,482 | $5,747,743 | $3,337,222 |
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