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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 ... | $16,133,580 | $19,825,736 | $49,568,563 | $63,608,922 | $103,943,292 | $43,665,323 | $35,836,372 |
| Casing & tubing of a kind used in drilling for oil/gas, of iron/steel | $18,155 | $222,844 | $563,875 | $178,279 | $207,234 | $390,380 | $942,599 |
| Tubes, pipes & hollow profiles (excl. of 7306.10 & 7306.20), welded, of cir ... | $107,200,165 | $139,656,166 | $188,278,803 | $188,824,942 | $69,344,469 | $84,195,403 | $135,884,408 |
| Tubes, pipes & hollow profiles (excl. of 7306.10-7306.30), welded, of circu ... | $41,067,926 | $61,253,703 | $92,518,640 | $72,113,843 | $40,316,394 | $41,365,049 | $56,937,006 |
| Tubes, pipes & hollow profiles (excl. of 7306.10-7306.40), welded, of circu ... | $4,731,918 | $5,721,786 | $7,480,829 | $8,190,441 | $2,443,471 | $4,558,004 | $7,806,287 |
| Tubes, pipes & hollow profiles (excl. of 7306.10-7306.50), welded, of non-c ... | $89,092,672 | $104,467,250 | $163,326,884 | $129,901,444 | $58,560,121 | $64,831,850 | $86,649,713 |
| Tubes, pipes & hollow profiles of iron (excl. cast iron)/steel, n.e.s. (exc ... | $19,622,818 | $20,108,435 | $26,086,103 | $39,495,562 | $14,767,632 | $14,102,025 | $11,410,173 |
| Total | $277,867,234 | $351,255,920 | $527,823,697 | $502,313,433 | $289,582,613 | $253,108,034 | $335,466,558 |
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