Commodity20052009
Hydrogen$6,817 
Argon$4,206 
Rare gases other than argon$6,442$1,687
Oxygen$9,071$9,768
Silicon, cont. by wt. not <99.99% of silicon$25 
Silicon, cont. by wt. <99.99% of silicon$7$391
Total$26,568$11,846