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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $2,811,081 | $4,259,461 | $3,965,684 | $9,948,980 | $4,318,831 | $2,160,533 | $2,566,049 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $5,922,384 | $10,983,811 | $9,293,506 | $10,680,777 | $3,622,421 | $6,130,409 | $12,379,059 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $413,481 | $191,613 | $769,424 | $1,036,356 | $183,584 | $1,449,719 | $2,786,076 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $3,113,172 | $22,207,327 | $5,225,463 | $4,574,316 | $5,440,898 | $12,079,169 | $6,707,345 |
| Total | $12,260,118 | $37,642,212 | $19,254,077 | $26,240,429 | $13,565,734 | $21,819,830 | $24,438,529 |
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