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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $141,212 | $62,186 | $43,742 | $4,141,489 | $170,003 | $51,484 | $57,988 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $91,968 | $4,733,394 | $153,613 | $1,409,427 | $654,425 | $163,431 | $257,973 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $9,250 | | | $7,897 | $16,424 | $12,493 | $668 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $104,656 | $76,558 | $159,724 | $508,362 | $87,325 | $425,762 | $134,069 |
| Total | $347,086 | $4,872,138 | $357,079 | $6,067,175 | $928,177 | $653,170 | $450,698 |
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