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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $708,717 | $694,074 | $1,361,868 | $1,148,142 | $672,945 | $720,239 | $1,305,553 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $3,094,004 | $2,657,706 | $6,330,157 | $4,628,357 | $2,642,134 | $4,759,943 | $4,880,136 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | | $5,139 | $4,933 | $48,508 | $81,150 | $19,297 | $175,109 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $734,705 | $932,434 | $1,516,316 | $1,972,083 | $708,412 | $820,570 | $1,189,543 |
| Total | $4,537,426 | $4,289,353 | $9,213,274 | $7,797,090 | $4,104,641 | $6,320,049 | $7,550,341 |
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