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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $60,907 | $226,625 | $252,422 | $201,022 | $139,210 | $544,631 | $118,614 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $618,955 | $611,675 | $1,100,494 | $944,715 | $245,811 | $1,446,925 | $401,670 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $7,716 | $11,394 | | $2,386 | $201,591 | | $57,852 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $79,633 | $160,927 | $105,859 | $100,358 | $140,098 | $995,282 | $661,801 |
| Total | $767,211 | $1,010,621 | $1,458,775 | $1,248,481 | $726,710 | $2,986,838 | $1,239,937 |
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