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| Commodity | 2005 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ... | | | $9,944 | $38,228 | $15,272 | $85 |
| Casing of a kind used in drilling for oil/gas, having circular cross-sectio ... | | | | | | $20,182 |
| Tubes & pipes (e.g., welded/riveted/similarly closed), having circular cros ... | $1,456 | $11,752 | $64,416 | $92,123 | $51,655 | $18,107 |
| Total | $1,456 | $11,752 | $74,360 | $130,351 | $66,927 | $38,374 |
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