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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $905,203 | $1,015,354 | $499,226 | $1,267,783 | $304,369 | $386,996 | $530,090 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $2,015,603 | $2,126,444 | $2,773,687 | $5,078,418 | $2,428,210 | $2,676,447 | $3,583,646 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | | | $11,472 | $10,922 | $38,749 | $63,285 | $6,646 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $618,816 | $1,391,606 | $1,342,496 | $905,125 | $664,949 | $1,548,686 | $1,539,523 |
| Total | $3,539,622 | $4,533,404 | $4,626,881 | $7,262,248 | $3,436,277 | $4,675,414 | $5,659,905 |
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