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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
| Furnace burners for liquid fuel | $170,405 | $101,988 | $236,001 | $90,429 | $391,985 | $277,149 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $72,348 | $169,530 | $346,601 | $323,125 | $549,452 | $802,281 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $780 | $517 | $45,059 | $37,567 | $1,465 | $2,348 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $222,865 | $191,921 | $163,134 | $216,130 | $225,661 | $356,874 |
| Total | $466,398 | $463,956 | $790,795 | $667,251 | $1,168,563 | $1,438,652 |
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