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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $356,690 | $309,717 | $441,775 | $535,182 | $423,972 | $603,204 | $571,660 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $1,073,506 | $965,030 | $899,807 | $955,419 | $766,456 | $668,253 | $798,528 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | | $365 | $579,418 | $328,796 | $650,194 | $1,540 | |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $859,379 | $821,507 | $1,141,207 | $2,130,277 | $506,176 | $739,495 | $1,325,475 |
| Total | $2,289,575 | $2,096,619 | $3,062,207 | $3,949,674 | $2,346,798 | $2,012,492 | $2,695,663 |
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