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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $17,970,734 | $19,741,776 | $22,388,257 | $14,974,415 | $12,289,603 | $11,819,021 | $5,170,634 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $5,488,663 | $6,558,246 | $5,095,822 | $6,533,390 | $4,972,153 | $3,565,133 | $5,397,634 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $566,508 | $27,307,577 | $17,010,854 | $2,179,407 | $1,463,472 | $2,042,641 | $3,854,954 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $5,254,575 | $5,365,092 | $6,485,309 | $9,029,060 | $6,772,760 | $4,926,874 | $5,460,391 |
| Total | $29,280,480 | $58,972,691 | $50,980,242 | $32,716,272 | $25,497,988 | $22,353,669 | $19,883,613 |
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