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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $345,900 | $475,100 | $562,000 | $685,700 | $275,800 | $481,100 | $597,500 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $685,700 | $608,800 | $871,100 | $1,138,300 | $367,300 | $646,500 | $1,613,600 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $10,400 | $6,200 | $653,000 | $622,300 | $48,300 | $391,300 | $259,000 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $26,400 | $44,100 | $124,100 | $76,900 | $23,000 | $40,300 | $86,300 |
| Total | $1,068,400 | $1,134,200 | $2,210,200 | $2,523,200 | $714,400 | $1,559,200 | $2,556,400 |
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