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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $1,846,363 | $2,184,155 | $2,595,586 | $1,723,896 | $1,751,779 | $2,607,888 | $3,019,953 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $3,862,165 | $3,918,373 | $5,072,978 | $6,839,092 | $3,041,521 | $3,863,400 | $4,912,120 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $66,770 | $43,549 | $111 | $47,007 | $8,293 | $121,383 | $12,540 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $802,503 | $963,666 | $2,846,950 | $4,654,242 | $4,951,063 | $2,212,114 | $4,598,926 |
| Total | $6,577,801 | $7,109,743 | $10,515,625 | $13,264,237 | $9,752,656 | $8,804,785 | $12,543,539 |
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