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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Refractory bricks, blocks, tiles & sim. refractory ceramic constructional g ... | $3,059,000 | $1,996,000 | $3,387,000 | $2,462,000 | $2,808,000 | $1,423,000 | $3,122,000 |
| Refractory bricks, blocks, tiles & sim. refractory ceramic constructional g ... | $7,964,000 | $6,310,000 | $5,032,000 | $4,334,000 | $3,721,000 | $4,514,000 | $3,745,000 |
| Refractory bricks, blocks, tiles & sim. refractory ceramic constructional g ... | $2,600,000 | $1,643,000 | $2,390,000 | $1,766,000 | $1,321,000 | $857,000 | $1,436,000 |
| Total | $13,623,000 | $9,949,000 | $10,809,000 | $8,562,000 | $7,850,000 | $6,794,000 | $8,303,000 |
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