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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $2,110,052 | $1,993,730 | $2,208,199 | $1,813,006 | $2,071,154 | $1,870,526 | $1,575,726 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $179,311 | $95,505 | $360,350 | $755,338 | $160,735 | $247,609 | $58,968 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $59,924 | $15,842 | $49,666 | $65,235 | $46,203 | | $7,458 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $1,290,194 | $2,553,314 | $2,180,666 | $1,593,266 | $1,891,691 | $1,327,254 | $1,024,714 |
| Total | $3,639,481 | $4,658,391 | $4,798,881 | $4,226,845 | $4,169,783 | $3,445,389 | $2,666,866 |
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