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| Commodity | 2006 | 2007 | 2008 | 2009 | 2010 |
| Furnace burners for liquid fuel | $471,380 | $630,345 | $212,900 | $242,662 | $476,746 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $636,068 | $1,908,036 | $2,151,296 | $2,045,074 | $7,392,607 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $37,991 | $2,728 | $23,594 | $8,230 | $86,706 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $758,779 | $121,794 | $994,598 | $665,535 | $558,117 |
| Total | $1,904,218 | $2,662,903 | $3,382,388 | $2,961,501 | $8,514,176 |
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