Commodity200520062007200820092011
Hydrogen$24,062$14,764$7,971$7,863$16,046$6,134
Argon$301,395$260,712$508,897$716,558$633,504$772,766
Rare gases other than argon$96,666$70,190$127,701$157,815$143,753$209,727
Nitrogen$83,737$38,937$68,167$86,454$103,700$186,960
Oxygen$1,393,746$87,246$153,997$1,060,290$1,119,989$1,021,240
Silicon, cont. by wt. not <99.99% of silicon$66     
Silicon, cont. by wt. <99.99% of silicon $85,293$134,867$175,344$175,911$1,679,743
Phosphorus$28$19$42$77  
Arsenic     $7,185
Selenium$343 $220$448$27,510$124,066
Total$1,900,043$557,161$1,001,862$2,204,849$2,220,413$4,007,821