Commodity2005200620072008200920102011
Carbides, of calcium, whether or not chemically defined$37   $791 $345
Carbides, of silicon, whether or not chemically defined$818$284 $2,428 $3,234 
Carbides other than of carbon/silicon, whether or not chemically defined  $112  $775 
Total$855$284$112$2,428$791$4,009$345