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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $1,318,270 | $1,735,033 | $2,916,547 | $3,499,819 | $1,979,230 | $855,249 | $1,185,344 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $14,545,333 | $17,393,686 | $10,286,064 | $9,865,987 | $6,201,315 | $5,132,974 | $8,178,410 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $409,115 | $53,760 | $223,942 | $323,389 | $105,000 | $511,083 | $190,815 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $4,694,663 | $10,042,754 | $5,603,054 | $9,962,205 | $17,489,315 | $5,081,533 | $12,815,053 |
| Total | $20,967,381 | $29,225,233 | $19,029,607 | $23,651,400 | $25,774,860 | $11,580,839 | $22,369,622 |
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