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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $11,608,526 | $15,995,713 | $16,362,417 | $10,901,733 | $8,943,102 | $9,465,157 | $9,472,708 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $1,139,898 | $1,960,682 | $2,210,082 | $1,811,882 | $950,406 | $992,804 | $1,493,448 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $220,309 | $147,096 | $84,170 | $5,669 | $10,660 | $10,563 | |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $2,135,251 | $2,029,253 | $2,303,317 | $5,382,945 | $6,836,605 | $7,321,241 | $8,584,340 |
| Total | $15,103,984 | $20,132,744 | $20,959,986 | $18,102,229 | $16,740,773 | $17,789,765 | $19,550,496 |
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