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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $5,925 | $9,582 | $14,305 | $5,286 | $54,139 | $167,988 | $85,049 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $311,682 | $119,127 | $99,482 | $106,880 | $209,787 | $440,782 | $1,069,904 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $242,773 | $109,347 | | | | $466,186 | $707,538 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $127,353 | $51,426 | $40,039 | $114,348 | $40,903 | $300,698 | $135,702 |
| Total | $687,733 | $289,482 | $153,826 | $226,514 | $304,829 | $1,375,654 | $1,998,193 |
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