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| Commodity | 2005 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Vitrifiable enamels & glazes, engobes (slips) & sim. preps. | | $2,514 | | $520 | $4,360 | $104 |
| Glass frit & oth. glass, in the form of powder/granules/flakes | $138 | $382 | $14 | $1,345 | $5,392 | $3,438 |
| Total | $138 | $2,896 | $14 | $1,865 | $9,752 | $3,542 |
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