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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $174,894 | $88,878 | $208,766 | $558,932 | $450,749 | $370,022 | $785,078 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $1,702,723 | $2,656,880 | $1,886,843 | $4,311,054 | $1,323,100 | $817,955 | $1,577,582 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $248,573 | $1,315,350 | $1,716,396 | $2,554,067 | $617,863 | $895,565 | $394,903 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $1,151,556 | $1,577,806 | $2,081,379 | $2,134,742 | $1,212,407 | $683,937 | $1,253,258 |
| Total | $3,277,746 | $5,638,914 | $5,893,384 | $9,558,795 | $3,604,119 | $2,767,479 | $4,010,821 |
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