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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 |
| Furnace burners for liquid fuel | $26 | $3,001 | $9,349 | $1,565 | $46,512 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $670,375 | $242,957 | $44,236 | $1,126,666 | $16,656 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | | $82,074 | $1,676 | $405,240 | $2,171 |
| Total | $670,401 | $328,032 | $55,261 | $1,533,471 | $65,339 |
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