|
| Commodity | 2005 | 2006 | 2007 | 2008 |
| Hydrogen | $2,813 | | $675 | $199 |
| Rare gases other than argon | $8,851 | $9,364 | $7,435 | $4,993 |
| Nitrogen | $535 | $908 | $298 | $324 |
| Oxygen | $37,330 | $31,751 | $22,056 | $50,110 |
| Silicon, cont. by wt. not <99.99% of silicon | $170 | $219 | $1,256 | $1,945 |
| Silicon, cont. by wt. <99.99% of silicon | $31 | $3,315 | $181 | $182 |
| Arsenic | | | $12,844 | $124,633 |
| Total | $49,730 | $45,557 | $44,745 | $182,386 |
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