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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
| Furnace burners for liquid fuel | $2,025,011 | $6,609,475 | $4,588,162 | | | $2,359,736 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $4,678,573 | $6,067,860 | $6,704,810 | | $899,010 | $8,159,210 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $6,541,769 | $8,030,717 | $13,459,651 | $564,801 | $494,709 | $11,743,215 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $8,263,570 | $19,914,972 | $35,487,164 | $541,867 | | $12,054,415 |
| Total | $21,508,923 | $40,623,024 | $60,239,787 | $1,106,668 | $1,393,719 | $34,316,576 |
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