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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $797,653 | $1,483,501 | $5,004,421 | $1,986,253 | $1,827,864 | $884,084 | $599,104 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $6,240,341 | $2,978,584 | $3,117,062 | $3,527,223 | $1,780,867 | $826,899 | $1,956,638 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $1,585,097 | $604,693 | $696,712 | $7,618 | $5,915 | $158,976 | $1,393,472 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $2,750,872 | $1,808,757 | $2,332,065 | $2,463,642 | $1,600,877 | $1,001,795 | $5,522,627 |
| Total | $11,373,963 | $6,875,535 | $11,150,260 | $7,984,736 | $5,215,523 | $2,871,754 | $9,471,841 |
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