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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $838,668 | $1,227,643 | $1,010,327 | $3,317,014 | $1,594,768 | $40,508,763 | $1,318,028 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $16,744,700 | $17,742,827 | $12,069,775 | $24,955,535 | $17,726,865 | $248,208,813 | $11,629,520 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $237,734 | $105,062 | $179,543 | $385,109 | $2,972,536 | $210,688 | $84,739 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $9,400,948 | $12,100,211 | $24,943,671 | $23,050,374 | $14,398,414 | $16,507,559 | $14,720,618 |
| Total | $27,222,050 | $31,175,743 | $38,203,316 | $51,708,032 | $36,692,583 | $305,435,823 | $27,752,905 |
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