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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $170,560 | $746,937 | $686,706 | $588,349 | $565,659 | $1,314,728 | $52,213 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $3,109,080 | $2,961,038 | $2,998,096 | $6,756,750 | $6,447,898 | $1,784,990 | $1,838,304 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $108,026 | $36,795 | $45,709 | $6,449 | $3,822 | $9,790 | $5,872 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $1,779,388 | $1,936,896 | $1,801,827 | $2,006,353 | $2,740,311 | $1,138,836 | $823,250 |
| Total | $5,167,054 | $5,681,666 | $5,532,338 | $9,357,901 | $9,757,690 | $4,248,344 | $2,719,639 |
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