|
| Commodity | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $701 | $10,716 | $484,591 | | | |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $277 | | $65 | | $4,731 | $8,882 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | | | | $120 | | $1,813 |
| Total | $978 | $10,716 | $484,656 | $120 | $4,731 | $10,695 |
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