Commodity200520062007200820092011
Disodium sulphate$81 $48   
Sulphates of magnesium$240$763$80   
Sulphates of copper$110$440$419$300$870 
Sulphates of zinc $322    
Sulphates of barium $168    
Sulphates (excl. of 2833.21-2833.27) $254$180 $555$662
Alums $360  $300 
Peroxosulphates (persulphates)$30$75$131$63 $68
Total$461$2,382$858$363$1,725$730