Commodity2005200620072008200920102011
Hydrogen$281$9$52$389$518$419$2,797
Argon    $174,812$176,684$76,045
Rare gases other than argon     $20,993$191,096
Nitrogen$3,915$7,318$556$17,353$25,258$27,109$49,282
Oxygen$1,598$1,133$2,820$4,309$78,748$81,848$69,542
Silicon, cont. by wt. not <99.99% of silicon    $1,447 $512
Silicon, cont. by wt. <99.99% of silicon      $2,675
Phosphorus     $4,392 
Selenium   $2   
Total$5,794$8,460$3,428$22,053$280,783$311,445$391,949