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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $52,936 | $91,115 | $22,723 | $102,799 | $177,316 | $94,178 | $70,412 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $125,711 | $141,150 | $155,324 | $685,172 | $580,476 | $929,481 | $1,693,273 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | | $955 | $1,347,722 | $1,040,996 | $391,089 | $359,596 | $792,883 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $432,952 | $86,290 | $301,806 | $1,031,730 | $808,176 | $1,369,178 | $2,059,131 |
| Total | $611,599 | $319,510 | $1,827,575 | $2,860,697 | $1,957,057 | $2,752,433 | $4,615,699 |
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