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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $6,255,846 | $8,083,546 | $7,582,150 | $10,945,410 | $9,412,953 | $7,031,471 | $4,976,416 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $2,039,124 | $2,652,712 | $3,391,312 | $4,524,653 | $7,307,273 | $4,814,199 | $5,484,900 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $6,631,827 | $6,096,612 | $7,116,253 | $5,169,359 | $7,027,841 | $6,001,019 | $5,131,627 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $8,804,364 | $9,864,271 | $8,665,903 | $11,744,875 | $12,396,673 | $8,553,857 | $10,141,316 |
| Total | $23,731,161 | $26,697,141 | $26,755,618 | $32,384,297 | $36,144,740 | $26,400,546 | $25,734,259 |
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