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| Commodity | 2005 | 2007 | 2011 |
| Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ... | | | $1,797 |
| Casing of a kind used in drilling for oil/gas, having circular cross-sectio ... | | $14,835 | $1,936 |
| Tubes & pipes (e.g., welded/riveted/similarly closed), having circular cros ... | $161 | | $195,424 |
| Total | $161 | $14,835 | $199,157 |
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