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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ... | $61,235,605 | $91,603,713 | $300,236,096 | $476,483,216 | $429,625,110 | $364,880,797 | $717,031,312 |
| Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ... | $1,545,373 | $23,874,877 | $66,708,752 | $236,075,217 | $68,005,364 | $93,106,056 | $194,938,551 |
| Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ... | $126,006,762 | $296,952,442 | $296,509,429 | $1,095,420,567 | $970,974,776 | $165,506,932 | $423,579,119 |
| Casing of a kind used in drilling for oil/gas, having circular cross-sectio ... | $1,507,086 | $969,487 | $26,196,693 | $8,168,712 | $6,989,632 | $5,285,710 | $5,318,979 |
| Tubes & pipes (excl. of 7305.11-7305.20), having circular cross-sections, t ... | $942,072 | $13,498,550 | $22,965,206 | $13,735,435 | $17,276,955 | $65,379,176 | $53,430,959 |
| Tubes & pipes (excl. of 7305.11-7305.20), having circular cross-sections, t ... | $13,977,490 | $23,991,588 | $64,538,377 | $38,701,372 | $86,314,586 | $68,487,092 | $86,967,883 |
| Tubes & pipes (e.g., welded/riveted/similarly closed), having circular cros ... | $576,367 | $3,325,920 | $18,898,829 | $9,560,444 | $7,425,695 | $10,176,165 | $8,792,430 |
| Total | $205,790,755 | $454,216,577 | $796,053,382 | $1,878,144,963 | $1,586,612,118 | $772,821,928 | $1,490,059,233 |
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