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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
| Furnace burners for liquid fuel | $12,147 | $43,772 | $95,149 | $82,010 | $17,160 | $1,795 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $18,837 | $125,676 | $27,073 | $303,609 | $145,320 | $41,820 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $1,490 | $48,612 | $52,708 | $42,072 | $397 | $809 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $61,952 | $153,293 | $123,548 | $41,936 | $116,885 | $69,593 |
| Total | $94,426 | $371,353 | $298,478 | $469,627 | $279,762 | $114,017 |
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