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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 ... | $12,330,198 | $60,203,762 | $129,447,793 | $60,181,428 | $75,810,453 | $43,406,174 | $28,751,808 |
| Casing & tubing of a kind used in drilling for oil/gas, of iron/steel | $16,648,195 | $25,112,322 | $32,025,782 | $67,097,335 | $76,934,645 | $66,323,191 | $44,896,505 |
| Tubes, pipes & hollow profiles (excl. of 7306.10 & 7306.20), welded, of cir ... | $18,286,274 | $24,362,781 | $28,582,619 | $31,119,644 | $41,271,984 | $31,952,395 | $47,184,690 |
| Tubes, pipes & hollow profiles (excl. of 7306.10-7306.30), welded, of circu ... | $21,860,805 | $49,498,609 | $96,792,667 | $121,760,352 | $66,217,569 | $80,281,441 | $42,069,738 |
| Tubes, pipes & hollow profiles (excl. of 7306.10-7306.40), welded, of circu ... | $2,667,255 | $5,408,723 | $13,043,387 | $7,512,794 | $31,364,205 | $13,054,350 | $10,857,161 |
| Tubes, pipes & hollow profiles (excl. of 7306.10-7306.50), welded, of non-c ... | $6,369,045 | $7,891,404 | $9,462,058 | $28,936,117 | $25,114,289 | $28,131,542 | $27,343,624 |
| Tubes, pipes & hollow profiles of iron (excl. cast iron)/steel, n.e.s. (exc ... | $69,759,490 | $217,709,986 | $159,534,541 | $198,343,701 | $87,813,631 | $147,379,463 | $174,212,846 |
| Total | $147,921,262 | $390,187,587 | $468,888,847 | $514,951,371 | $404,526,776 | $410,528,556 | $375,316,372 |
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