Commodity2005200620072008
Sodium metasilicates  $4$26
Silicates of sodium other than sodiummetasilicates$3,557$3,344$2,303$1,816
Potsssium silicates $248$33 
Silicates other than of sodium/potassium; commercial alkali metal silicates ... $61 $4,941
Total$3,557$3,653$2,340$6,783