Commodity2005200620072009
Hydrogen$5,649$5,364$2,076$4,801
Argon$113,630$112,140$125,018$87,852
Rare gases other than argon$55,459$134,884$176,741$95,117
Nitrogen$21,017$99,077$18,265$150,462
Oxygen$52,668$226,141$139,206$591,741
Boron; tellurium$1,451   
Silicon, cont. by wt. not <99.99% of silicon  $801 
Silicon, cont. by wt. <99.99% of silicon$104$3,968$753$68
Phosphorus$22,208$20,543$16,536$2,635
Arsenic  $53 
Selenium$2,113$283$53 
Total$274,299$602,400$479,502$932,676