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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $723,126 | $1,066,721 | $1,068,147 | $11,402,724 | $1,543,531 | $2,579,534 | $5,037,301 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $7,293,621 | $7,760,637 | $12,538,405 | $23,118,802 | $18,380,042 | $15,057,718 | $15,207,651 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $870,680 | $3,367,685 | $15,423 | $3,513,644 | $10,996,007 | $48,806 | $322,686 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $5,442,396 | $4,239,273 | $6,365,573 | $9,851,421 | $10,255,432 | $9,305,148 | $10,622,848 |
| Total | $14,329,823 | $16,434,316 | $19,987,548 | $47,886,591 | $41,175,012 | $26,991,206 | $31,190,486 |
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