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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2011 |
| Furnace burners for liquid fuel | $228,091 | $516,609 | $295,813 | $271,336 | $324,907 | $210,068 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $170,774 | $289,398 | $407,406 | $1,011,944 | $1,188,247 | $200,275 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $22,762 | $21,830 | $7 | $1,567 | | $6,239 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $74,585 | $119,548 | $185,207 | $376,447 | $196,043 | $386,087 |
| Total | $496,212 | $947,385 | $888,433 | $1,661,294 | $1,709,197 | $802,669 |
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