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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Line pipe (excl. seamless), of a kind used for oil/gas pipelines, of iron/s ... | $117,932,257 | $272,495,037 | $350,895,410 | $545,038,168 | $512,553,138 | $395,432,675 | $350,049,674 |
| Casing & tubing of a kind used in drilling for oil/gas, of iron/steel | $21,778,764 | $12,369,267 | $6,592,703 | $8,023,668 | $7,247,374 | $73,558,146 | $122,833,134 |
| Tubes, pipes & hollow profiles (excl. of 7306.10 & 7306.20), welded, of cir ... | $291,637,487 | $238,473,154 | $277,199,058 | $387,627,907 | $226,614,995 | $335,564,115 | $414,295,598 |
| Tubes, pipes & hollow profiles (excl. of 7306.10-7306.30), welded, of circu ... | $1,831,136 | $2,408,883 | $4,806,508 | $11,170,973 | $6,173,198 | $7,462,132 | $10,303,149 |
| Tubes, pipes & hollow profiles (excl. of 7306.10-7306.40), welded, of circu ... | $1,372,170 | $1,995,480 | $2,324,941 | $1,354,774 | $1,790,749 | $1,261,243 | $1,471,689 |
| Tubes, pipes & hollow profiles (excl. of 7306.10-7306.50), welded, of non-c ... | $293,772,307 | $378,879,954 | $447,640,542 | $523,285,656 | $229,808,370 | $343,833,262 | $421,751,506 |
| Tubes, pipes & hollow profiles of iron (excl. cast iron)/steel, n.e.s. (exc ... | $10,183,782 | $7,087,449 | $9,939,071 | $15,969,993 | $13,310,662 | $12,521,319 | $16,215,233 |
| Total | $738,507,903 | $913,709,224 | $1,099,398,233 | $1,492,471,139 | $997,498,486 | $1,169,632,892 | $1,336,919,983 |
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