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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
| Furnace burners for liquid fuel | $49,576 | $118,418 | $270,023 | $356,936 | $56,901 | $74,244 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $762,340 | $595,230 | $1,451,865 | $963,950 | $505,840 | $435,381 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | | $17 | | $1,439 | $14 | $286,038 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $87,969 | $70,979 | $1,959,908 | $358,649 | $161,246 | $60,682 |
| Total | $899,885 | $784,644 | $3,681,796 | $1,680,974 | $724,001 | $856,345 |
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