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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $7,857 | $5,267 | $51,796 | $13,218 | $6,592 | $123,424 | $18,064 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $98,424 | $11,450 | $311,536 | $686,516 | $550,916 | $195,042 | $11,124 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | | | | $2,001 | $629 | | |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $2,043,877 | $875,986 | $255,334 | $226,172 | $176,400 | $243,580 | $506,046 |
| Total | $2,150,158 | $892,703 | $618,666 | $927,907 | $734,537 | $562,046 | $535,234 |
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