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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $299,556 | $148,144 | $83,573 | $322,920 | $89,335 | $1,331,968 | $209,440 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $177,061 | $191,562 | $293,174 | $148,409 | $41,577 | $157,021 | $209,794 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $3,665 | $8,662 | $11,017 | $70,679 | $2,019 | $14,301 | $9,992 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $169,398 | $170,899 | $307,836 | $168,228 | $300,337 | $151,604 | $225,984 |
| Total | $649,680 | $519,267 | $695,600 | $710,236 | $433,268 | $1,654,894 | $655,210 |
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