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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $266,006 | $264,388 | $354,443 | $2,697,885 | $221,685 | $540,093 | $435,953 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $11,998,153 | $7,166,437 | $13,098,836 | $7,921,174 | $8,689,296 | $2,465,158 | $2,542,965 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $8,110,877 | $802,464 | $114,508 | $3,081,582 | $192,687 | $219,088 | $107,442 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $939,703 | $2,008,518 | $869,834 | $1,654,223 | $4,521,953 | $1,890,410 | $1,624,831 |
| Total | $21,314,739 | $10,241,807 | $14,437,621 | $15,354,864 | $13,625,621 | $5,114,749 | $4,711,191 |
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