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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $1,807,661 | $1,778,428 | $2,683,172 | $2,580,979 | $188,430 | $106,899 | $308,727 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $2,825,152 | $3,488,513 | $5,437,574 | $5,016,623 | $3,410,179 | $6,368,926 | $5,126,844 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $435,640 | $6,016,981 | $10,624,240 | $8,009,942 | $5,736,031 | $89,483 | $7,301,872 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $1,183,883 | $1,419,069 | $840,470 | $680,336 | $621,600 | $4,652,893 | $3,801,900 |
| Total | $6,252,336 | $12,702,991 | $19,585,456 | $16,287,880 | $9,956,240 | $11,218,201 | $16,539,343 |
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