Commodity2005200620072008200920102011
Silica sands & quartz sands, whether or not coloured$397$807$828$188$39,015$137,779 
Natural sands other than silica & quartz, whether or not coloured, other th ...$529,586$429$111,616$388,232$795$490$195
Total$529,983$1,236$112,444$388,420$39,810$138,269$195