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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $2,160,069 | $2,402,579 | $2,103,358 | $4,308,306 | $3,334,277 | $2,108,952 | $2,328,036 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $9,840,903 | $13,774,601 | $17,445,299 | $18,386,596 | $12,587,649 | $14,064,670 | $27,119,249 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $1,744,461 | $7,021,528 | $4,154,903 | $6,408,286 | $7,466,371 | $2,571,465 | $5,083,209 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $10,547,983 | $11,838,638 | $18,060,039 | $13,510,544 | $30,180,961 | $12,121,117 | $15,368,381 |
| Total | $24,293,416 | $35,037,346 | $41,763,599 | $42,613,732 | $53,569,258 | $30,866,204 | $49,898,875 |
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