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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $24,612 | $706,567 | $1,310,865 | $1,779,309 | $46,300 | $30,436 | $32,048 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $1,875,379 | $4,098,951 | $5,927,460 | $6,280,204 | $5,605,162 | $7,001,651 | $8,523,166 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | | $54 | | | | $2,849 | $306,095 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $1,468,230 | $2,493,820 | $2,088,053 | $2,437,825 | $1,991,085 | $954,722 | $562,934 |
| Total | $3,368,221 | $7,299,392 | $9,326,378 | $10,497,338 | $7,642,547 | $7,989,658 | $9,424,243 |
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