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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $443,922 | $1,689,056 | $1,461,379 | $620,478 | $346,580 | $373,809 | $398,957 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $7,011,698 | $7,273,484 | $11,592,380 | $12,186,187 | $7,470,296 | $6,544,795 | $15,753,285 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $35,701 | $2,150 | $22,716 | $59,257 | $80,011 | $189,893 | $538,297 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $6,280,835 | $6,047,495 | $9,125,546 | $10,238,527 | $7,845,639 | $9,492,834 | $14,275,530 |
| Total | $13,772,156 | $15,012,185 | $22,202,021 | $23,104,449 | $15,742,526 | $16,601,331 | $30,966,069 |
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