|
| Commodity | 2005 | 2007 | 2010 | 2011 |
| Sodium metasilicates | $5,000 | | $168,000 | |
| Silicates of sodium other than sodiummetasilicates | | | $1,000 | $4,000 |
| Silicates other than of sodium/potassium; commercial alkali metal silicates ... | $48,000 | $61,000 | | |
| Total | $53,000 | $61,000 | $169,000 | $4,000 |
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