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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $27,827 | $57,792 | $15,742 | $932,786 | $110,671 | $41,846 | $58,981 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $14,239 | $50,181 | $482,720 | $187,915 | $157,729 | $67,994 | $1,122,305 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $1,566 | $13,870 | $7,314 | $45,569 | $45,737 | $18,950 | $5,607 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $454,297 | $334,776 | $1,073,261 | $481,018 | $1,258,426 | $1,311,407 | $3,069,565 |
| Total | $497,929 | $456,619 | $1,579,037 | $1,647,288 | $1,572,563 | $1,440,197 | $4,256,458 |
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