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| Commodity | 2005 | 2006 | 2007 | 2008 |
| Silicates of sodium other than sodiummetasilicates | $22,065 | $3,440 | $5,816 | $2,393 |
| Potsssium silicates | $12,418 | | | |
| Silicates other than of sodium/potassium; commercial alkali metal silicates ... | $4,156 | $2,989 | $6,039 | $13,139 |
| Total | $38,639 | $6,429 | $11,855 | $15,532 |
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