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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
| Furnace burners for liquid fuel | $6,456 | $11,177 | $44,889 | $42,093 | $206 | $17,519 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $8,026 | $12,039 | $44,622 | $56,287 | $398,569 | $128,992 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $1,982 | $958 | $8,798 | $1,431 | $12,327 | |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $14,009 | $16,640 | $21,168 | $5,924 | $630,743 | $82,524 |
| Total | $30,473 | $40,814 | $119,477 | $105,735 | $1,041,845 | $229,035 |
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