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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $3,563,087 | $1,197,054 | $2,163,041 | $3,056,262 | $1,167,189 | $1,961,732 | $3,331,414 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $1,677,383 | $1,609,710 | $2,580,242 | $3,158,137 | $2,357,292 | $5,529,555 | $1,452,172 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $2,141 | $372,506 | $22,358 | $8,924 | $867,590 | $21,331 | $5,239 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $5,812,708 | $6,470,469 | $8,744,998 | $9,595,428 | $13,052,217 | $9,125,015 | $7,814,299 |
| Total | $11,055,319 | $9,649,739 | $13,510,639 | $15,818,751 | $17,444,288 | $16,637,633 | $12,603,124 |
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