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| Commodity | 2005 | 2007 | 2008 |
| Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ... | $33,392,616 | $96,867,257 | $560,339,817 |
| Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ... | $301,035 | $8,532,692 | $22,874,383 |
| Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ... | $942,602 | $5,240,839 | $85,824,310 |
| Casing of a kind used in drilling for oil/gas, having circular cross-sectio ... | $11,565,159 | $90,626,117 | $62,225,346 |
| Tubes & pipes (excl. of 7305.11-7305.20), having circular cross-sections, t ... | $14,186,002 | $38,980,624 | $37,958,818 |
| Tubes & pipes (excl. of 7305.11-7305.20), having circular cross-sections, t ... | $25,471,736 | $10,545,946 | $19,818,321 |
| Tubes & pipes (e.g., welded/riveted/similarly closed), having circular cros ... | $2,436,577 | $6,899,201 | $6,947,294 |
| Total | $88,295,727 | $257,692,676 | $795,988,289 |
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