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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $9,000 | $42,868 | $30,563 | $11,391 | $24,846 | $2,881 | $99,017 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $7,000 | $1,980 | $95,932 | $18,405 | $20,948 | $10,046 | $27,912 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $27,000 | $31,499 | $32,242 | $60,651 | $50,471 | $17,306 | $26,435 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | | $4,484 | $44,982 | $51,100 | $90,557 | $18,147 | $16,480 |
| Total | $43,000 | $80,831 | $203,719 | $141,547 | $186,822 | $48,380 | $169,844 |
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