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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $75,946 | $31,919 | $57,574 | $188,749 | $47,172 | $59,966 | $84,406 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $99,158 | $475,075 | $94,352 | $132,061 | $151,991 | $128,568 | $155,726 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $5,290 | $8,488 | $11,402 | $69,361 | $18,788 | $2,204 | $35,181 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $127,432 | $80,457 | $386,214 | $224,670 | $196,461 | $409,950 | $271,064 |
| Total | $307,826 | $595,939 | $549,542 | $614,841 | $414,412 | $600,688 | $546,377 |
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