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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $25,009 | $71,704 | $52,076 | $110,297 | $43,953 | $108,690 | $23,206 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $388,113 | $488,135 | $108,256 | $403,340 | $192,991 | $151,419 | $54,125 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $65,530 | | $39,560 | $15,446 | $14,460 | $6,444 | $229,198 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $230,005 | $208,377 | $761,694 | $1,082,946 | $307,411 | $558,028 | $304,417 |
| Total | $708,657 | $768,216 | $961,586 | $1,612,029 | $558,815 | $824,581 | $610,946 |
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