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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $3,776 | $26,728 | $2,412 | $701 | $974,312 | $14,231 | $300,537 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $1,071 | $4,597 | $694 | $214,075 | $1,654 | $15,765 | $7,451 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $131 | $952 | | $1,816,910 | $16,844 | $11,698,245 | $2,380,033 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $169,244 | $273,993 | $527,889 | $65,091 | $117,290 | $963,016 | $317,551 |
| Total | $174,222 | $306,270 | $530,995 | $2,096,777 | $1,110,100 | $12,691,257 | $3,005,572 |
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