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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $25,519,427 | $23,034,569 | $21,269,025 | $22,413,703 | $17,572,564 | $18,408,667 | $16,650,508 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $8,460,652 | $10,844,111 | $9,782,293 | $14,670,518 | $7,615,234 | $8,657,662 | $10,385,399 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $3,288,214 | $4,444,139 | $5,752,610 | $5,542,072 | $6,473,635 | $3,684,919 | $5,174,333 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $16,107,720 | $15,327,360 | $17,779,506 | $24,381,237 | $19,004,315 | $19,596,119 | $20,846,063 |
| Total | $53,376,013 | $53,650,179 | $54,583,434 | $67,007,530 | $50,665,748 | $50,347,367 | $53,056,303 |
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