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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 ... | $18,275 | $12,611 | $9,793 | $560 | $419,529 | $231,211 | $203,567 |
| Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ... | $5,538,431 | $3,956,693 | $434,005 | $1,209,893 | $3,964,183 | $5,245,256 | $792,781 |
| Line pipe of a kind used for oil/gas pipelines, having circular cross-secti ... | $19,796 | $839,716 | $6,221,967 | $8,142,779 | $2,203,530 | $5,333,501 | $1,180,922 |
| Casing of a kind used in drilling for oil/gas, having circular cross-sectio ... | | $1,203 | $42,867 | $276,517 | $19,030 | $87,757 | $49,547 |
| Tubes & pipes (excl. of 7305.11-7305.20), having circular cross-sections, t ... | $427,811 | $610,556 | $1,724,757 | $1,196,319 | $5,977,501 | $1,058,278 | $1,941,906 |
| Tubes & pipes (excl. of 7305.11-7305.20), having circular cross-sections, t ... | $716,709 | $276,853 | $1,631,877 | $1,959,586 | $2,927,661 | $1,660,504 | $10,647,056 |
| Tubes & pipes (e.g., welded/riveted/similarly closed), having circular cros ... | $1,634,703 | $1,575,150 | $1,429,079 | $1,086,874 | $2,302,039 | $1,832,728 | $1,673,784 |
| Total | $8,355,725 | $7,272,782 | $11,494,345 | $13,872,528 | $17,813,473 | $15,449,235 | $16,489,563 |
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