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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $132,715 | $72,877 | $88,696 | $99,580 | $50,267 | $323,411 | $98,687 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $394,021 | $717,063 | $1,191,094 | $2,896,560 | $1,082,994 | $2,207,664 | $3,264,501 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $7,491 | | $499,085 | $914,230 | $326,513 | $810,765 | $715,852 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $22,570 | $84,334 | $146,667 | $317,590 | $299,182 | $57,580 | $153,531 |
| Total | $556,797 | $874,274 | $1,925,542 | $4,227,960 | $1,758,956 | $3,399,420 | $4,232,571 |
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