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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $1,227,043 | $1,167,138 | $896,187 | $1,619,372 | $718,500 | $975,930 | $1,584,497 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $2,145,786 | $1,399,980 | $1,810,134 | $2,514,505 | $1,741,901 | $1,907,699 | $2,626,213 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $160,254 | $285,131 | $479,860 | $117,332 | $229,199 | $40,976 | $78,065 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $4,711,994 | $3,196,795 | $5,126,334 | $5,293,477 | $3,540,846 | $3,889,203 | $2,502,416 |
| Total | $8,245,077 | $6,049,044 | $8,312,515 | $9,544,686 | $6,230,446 | $6,813,808 | $6,791,191 |
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