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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $357,900 | $528,900 | $554,200 | $758,600 | $588,600 | $1,540,200 | $637,500 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $4,585,300 | $4,909,800 | $8,727,500 | $12,976,300 | $5,458,800 | $7,192,600 | $9,616,000 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $815,900 | $2,686,100 | $493,400 | $1,266,500 | $409,800 | $173,500 | $127,300 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $228,500 | $460,200 | $250,700 | $406,700 | $1,146,200 | $943,500 | $613,300 |
| Total | $5,987,600 | $8,585,000 | $10,025,800 | $15,408,100 | $7,603,400 | $9,849,800 | $10,994,100 |
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