Commodity2005200620072008200920102011
Argon      $19,345
Rare gases other than argon      $1,766
Nitrogen$94,550$108,000$62,698$81,515$73,938$146,818$76,554
Oxygen$509,868$675,180$553,829$337,903$224,724$761,110$676,705
Silicon, cont. by wt. <99.99% of silicon $660     
Total$604,418$783,840$616,527$419,418$298,662$907,928$774,370