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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
| Furnace burners for liquid fuel | $3,432,499 | $2,923,158 | $2,219,639 | $2,039,401 | $1,990,797 | $2,311,997 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $10,061,643 | $12,711,151 | $21,978,056 | $21,783,040 | $7,245,271 | $7,921,695 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $42,602,262 | $61,252,641 | $45,647,877 | $83,313,363 | $77,832,271 | $52,599,985 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $17,604,027 | $23,283,887 | $31,537,037 | $35,445,832 | $25,270,897 | $23,034,668 |
| Total | $73,700,431 | $100,170,837 | $101,382,609 | $142,581,636 | $112,339,236 | $85,868,345 |
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