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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $3,476,985 | $7,812,444 | $7,302,911 | $9,703,555 | $4,231,303 | $9,549,723 | $11,246,638 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $32,419,300 | $38,004,126 | $59,548,929 | $61,556,981 | $45,582,053 | $54,470,459 | $87,707,103 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $1,912,153 | $4,763,107 | $1,420,620 | $13,924,633 | $517,847 | $3,156,382 | $8,512,881 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $2,752,117 | $4,092,252 | $2,511,599 | $6,489,026 | $3,306,778 | $5,543,254 | $10,651,290 |
| Total | $40,560,555 | $54,671,929 | $70,784,059 | $91,674,195 | $53,637,981 | $72,719,818 | $118,117,912 |
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