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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $2,221,823 | $1,493,656 | $1,351,184 | $1,888,247 | $1,177,394 | $2,701,440 | $1,267,990 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $1,265,222 | $5,059,205 | $2,932,471 | $2,273,666 | $1,894,629 | $1,843,345 | $4,982,593 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $74,425 | $28,136 | $107,101 | $653,133 | $45,386 | $1,720 | $298 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $1,243,242 | $1,576,248 | $2,562,112 | $2,552,778 | $2,063,467 | $2,116,103 | $2,854,481 |
| Total | $4,804,712 | $8,157,245 | $6,952,868 | $7,367,824 | $5,180,876 | $6,662,608 | $9,105,362 |
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