Commodity200520062007200820092010
Hydrogen$1,716$1,148$738$2,341$490$195
Argon$8,349$24,401$16,172$11,879$20,076$15,637
Rare gases other than argon$46,072$45,413$37,374$26,131$28,246$21,475
Nitrogen$21,023$23,768$35,636$35,075$19,609$17,355
Oxygen$70,081$74,372$190,853$153,851$124,512$115,101
Silicon, cont. by wt. not <99.99% of silicon  $55 $6 
Silicon, cont. by wt. <99.99% of silicon$2,642$406$362$217$790 
Phosphorus$1,021     
Total$150,904$169,508$281,190$229,494$193,729$169,763