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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $46,881 | $341,626 | $79,182 | $3,471 | $33,170 | $72,249 | $104,273 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $62,109 | $67,617 | $86,950 | $136,587 | $159,401 | $109,445 | $296,483 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $74,836 | $24,746 | $20,660 | $9,915 | $6,831 | $4,180 | $3,990 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $148,329 | $246,946 | $198,512 | $296,609 | $166,077 | $443,826 | $324,405 |
| Total | $332,155 | $680,935 | $385,304 | $446,582 | $365,479 | $629,700 | $729,151 |
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