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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $3,713,691 | $3,535,091 | $3,398,021 | $3,570,284 | $2,349,959 | $1,443,523 | $1,568,524 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $2,602,388 | $3,905,163 | $2,944,898 | $5,802,443 | $4,040,475 | $1,818,009 | $1,785,958 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $102,576 | $232,130 | $443,092 | $302,197 | $254,274 | $352,476 | $358,284 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $1,759,251 | $1,260,355 | $1,774,814 | $4,079,744 | $1,072,837 | $1,720,958 | $1,404,234 |
| Total | $8,177,906 | $8,932,739 | $8,560,825 | $13,754,668 | $7,717,545 | $5,334,966 | $5,117,000 |
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