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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $923,747 | $775,033 | $421,853 | $467,004 | $1,333,215 | $156,763 | $381,587 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $245,942 | $283,942 | $754,132 | $914,323 | $374,617 | $572,582 | $504,772 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $5,288 | $9,030 | $279,815 | $1,869 | $66,639 | $33,312 | $8,952 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $648,165 | $246,436 | $482,694 | $349,079 | $1,123,169 | $290,817 | $355,932 |
| Total | $1,823,142 | $1,314,441 | $1,938,494 | $1,732,275 | $2,897,640 | $1,053,474 | $1,251,243 |
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