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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $182,019 | $104,310 | $644,184 | $698,007 | $1,090,150 | $24,496 | $1,207,125 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $6,758,850 | $7,357,150 | $8,356,600 | $10,985,022 | $5,667,937 | $6,635,438 | $10,675,307 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $388,254 | $8,054 | $433,907 | $1,011,439 | $195,376 | $146,119 | $873,058 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $4,233,212 | $4,170,832 | $6,412,437 | $11,310,852 | $9,165,001 | $7,504,072 | $13,536,928 |
| Total | $11,562,335 | $11,640,346 | $15,847,128 | $24,005,320 | $16,118,464 | $14,310,125 | $26,292,418 |
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