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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $59,480 | $27,692 | $545,176 | $110,555 | $43,276 | $112,617 | $105,528 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $592,843 | $1,520,749 | $233,539 | $306,653 | $198,947 | $3,049,184 | $1,046,708 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $20,507 | $696,876 | $695,692 | $274,246 | $165,796 | $51,294 | $232,286 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $1,921,075 | $4,647,376 | $6,094,181 | $11,478,894 | $10,909,815 | $4,766,719 | $15,773,560 |
| Total | $2,593,905 | $6,892,693 | $7,568,588 | $12,170,348 | $11,317,834 | $7,979,814 | $17,158,082 |
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