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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $1,333,975 | $1,901,647 | $3,347,998 | $3,524,794 | $4,227,118 | $2,810,618 | $4,234,013 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $28,326,918 | $26,696,054 | $35,118,070 | $34,051,634 | $40,150,832 | $25,306,631 | $26,404,521 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $11,843,942 | $2,367,949 | $2,943,022 | $1,751,107 | $5,057 | $3,719,233 | $3,777,698 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $13,837,087 | $15,950,973 | $19,596,253 | $20,173,790 | $15,715,836 | $17,425,801 | $37,081,409 |
| Total | $55,341,922 | $46,916,623 | $61,005,343 | $59,501,325 | $60,098,843 | $49,262,283 | $71,497,641 |
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