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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $618,776 | $176,569 | $304,258 | $506,469 | $257,067 | $178,337 | $220,643 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $2,237,733 | $3,532,408 | $4,203,867 | $4,560,005 | $4,305,036 | $3,765,883 | $5,602,031 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $354,176 | $899,363 | $1,802,213 | $1,745,190 | $1,133,893 | $1,297,689 | $259,615 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $901,585 | $933,929 | $2,039,730 | $1,432,644 | $865,398 | $751,249 | $820,793 |
| Total | $4,112,270 | $5,542,269 | $8,350,068 | $8,244,308 | $6,561,394 | $5,993,158 | $6,903,082 |
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