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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
| Furnace burners for liquid fuel | $33,717 | $1,146 | $143 | $352,456 | $4,969 | $22,601 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $17,525 | $60,714 | $123,397 | $219,112 | $56,779 | $222,295 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | | $1,005 | $494,321 | | | $8,387 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $40,821 | $232,955 | $213,661 | $87,676 | $58,686 | $170,865 |
| Total | $92,063 | $295,820 | $831,522 | $659,244 | $120,434 | $424,148 |
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