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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
| Furnace burners for liquid fuel | $18,597,057 | $17,175,661 | $23,372,473 | $23,308,052 | $10,263,027 | $8,930,704 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $21,845,108 | $20,798,330 | $19,804,571 | $15,736,948 | $11,925,715 | $14,640,115 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $706,328 | $22,455 | $1,686,828 | $984,757 | $1,317,443 | $1,148,724 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $18,256,145 | $23,010,943 | $20,244,037 | $22,127,631 | $17,596,451 | $19,155,149 |
| Total | $59,404,638 | $61,007,389 | $65,107,909 | $62,157,388 | $41,102,636 | $43,874,692 |
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