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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $859,113 | $520,118 | $1,730,508 | $1,331,833 | $1,863,673 | $1,997,082 | $1,253,478 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $695,386 | $696,238 | $850,804 | $1,728,654 | $730,038 | $1,423,638 | $1,028,731 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $457,954 | $364,997 | $743,415 | $583,644 | $449,453 | $356,715 | $342,769 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $3,770,038 | $4,082,730 | $5,447,728 | $7,959,885 | $6,133,429 | $6,007,794 | $6,026,470 |
| Total | $5,782,491 | $5,664,083 | $8,772,455 | $11,604,016 | $9,176,593 | $9,785,229 | $8,651,448 |
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