|
| Commodity | 2005 | 2007 | 2010 | 2011 |
| Casing & tubing of a kind used in drilling for oil/gas, of iron/steel | $102,881 | | | |
| Tubes, pipes & hollow profiles (excl. of 7306.10 & 7306.20), welded, of cir ... | $231,768 | $369,673 | $503,669 | $488,591 |
| Tubes, pipes & hollow profiles (excl. of 7306.10-7306.50), welded, of non-c ... | $1,254,585 | $2,287,732 | $3,297,424 | $5,952,014 |
| Total | $1,589,234 | $2,657,405 | $3,801,093 | $6,440,605 |
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