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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 ... | $15,546 | $29,647,165 | $37,022,979 | $230,000,747 | $75,279,600 | $78,009,842 | $123,186,673 |
| Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ... | $740,434 | $1,258,619 | $1,761,109 | $5,689,970 | $762,060 | $5,692,459 | $5,999,616 |
| Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ... | $925,889 | $1,211,547 | $424,145 | $1,341,335 | $310,282 | $1,606,696 | $2,612,977 |
| Casing of a kind used in drilling for oil/gas, having circular cross-sectio ... | | $8,904 | $35,890 | | $149,515 | $314,686 | $59,343 |
| Tubes & pipes (excl. of 7305.11-7305.20), having circular cross-sections, t ... | $904,551 | $5,896,506 | $14,047,739 | $20,603,939 | $8,946,368 | $24,434,310 | $19,070,694 |
| Tubes & pipes (excl. of 7305.11-7305.20), having circular cross-sections, t ... | $4,488,882 | $2,767,865 | $418,989 | $703,261 | $2,195,818 | $1,339,597 | $15,817,891 |
| Tubes & pipes (e.g., welded/riveted/similarly closed), having circular cros ... | $47,378 | $1,317,310 | $685,886 | $83,788 | $246,623 | $240,396 | $2,273,821 |
| Total | $7,122,680 | $42,107,916 | $54,396,737 | $258,423,040 | $87,890,266 | $111,637,986 | $169,021,015 |
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