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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $11,741,367 | $9,975,161 | $8,132,854 | $10,561,127 | $5,646,889 | $6,870,719 | $5,986,798 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $16,694,814 | $23,208,783 | $40,394,498 | $30,603,750 | $17,164,402 | $17,229,144 | $21,566,177 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $247,560 | $1,502,788 | $1,523,438 | $1,912,171 | $1,498,162 | $930,189 | $1,193,927 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $17,576,020 | $19,141,693 | $24,786,500 | $27,205,689 | $21,040,640 | $15,577,621 | $26,424,504 |
| Total | $46,259,761 | $53,828,425 | $74,837,290 | $70,282,737 | $45,350,093 | $40,607,673 | $55,171,406 |
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