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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $1,272,260 | $3,388,884 | $2,662,648 | $1,863,627 | $1,550,083 | $2,023,761 | $2,567,137 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $15,032,551 | $12,214,958 | $18,661,031 | $19,268,376 | $14,830,822 | $15,726,944 | $18,848,416 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $1,450,325 | $2,499,670 | $3,833,452 | $1,194,568 | $1,914,145 | $185,298 | $3,467,760 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $9,853,582 | $10,042,781 | $11,179,946 | $11,801,172 | $7,565,952 | $9,252,676 | $11,300,322 |
| Total | $27,608,718 | $28,146,293 | $36,337,077 | $34,127,743 | $25,861,002 | $27,188,679 | $36,183,635 |
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