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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $1,587,000 | $1,544,962 | $1,661,516 | $1,756,786 | $2,125,784 | $2,478,168 | $2,835,617 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $73,000 | $61,362 | $801,354 | $172,238 | $211,969 | $1,437,815 | $349,719 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $92,000 | $474,804 | $121,109 | $109,181 | $123,160 | $124,337 | $73,165 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $252,000 | $356,577 | $307,507 | $280,083 | $418,003 | $455,134 | $378,356 |
| Total | $2,004,000 | $2,437,705 | $2,891,486 | $2,318,288 | $2,878,916 | $4,495,454 | $3,636,857 |
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