Commodity2005200620072008200920102011
Rare gases other than argon$1,871 $774    
Nitrogen     $4,583$2,656
Oxygen$6,235$1,490$6,172$3,905$3,535$14,069$14,393
Total$8,106$1,490$6,946$3,905$3,535$18,652$17,049