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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $2,983,922 | $2,618,672 | $2,571,204 | $2,394,540 | $2,869,433 | $2,286,772 | $1,547,521 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $3,510,149 | $4,243,604 | $4,213,652 | $6,091,132 | $3,354,355 | $3,812,948 | $3,582,434 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $70,916 | $197,618 | $348,270 | $400,585 | $183,514 | $227,998 | $283,745 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $1,875,231 | $1,231,979 | $1,734,127 | $4,567,756 | $2,456,238 | $2,292,145 | $1,924,842 |
| Total | $8,440,218 | $8,291,873 | $8,867,253 | $13,454,013 | $8,863,540 | $8,619,863 | $7,338,542 |
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