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| Chapter | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Iron and steel | $685,173 | $489,626 | $1,160,915 | $1,244,127 | $1,307,779 | $1,991,661 | $1,291,519 |
| Articles of iron or steel | $197,145 | | | | | $402 | $1,378 |
| Copper and articles thereof | $266,241 | $637,487 | $700,166 | $526,394 | $330,070 | $684,377 | $1,078,221 |
| Aluminum and articles thereof | $155,657 | $185,666 | $252,187 | $189,985 | $96,530 | $122,088 | $172,334 |
| Lead and articles thereof | | | $21,411 | | | | |
| Zinc and articles thereof | | | | $1,695 | | | |
| Tin and articles thereof | | $24,599 | | | | | |
| Tools, implements, cutlery, spoons and forks, of base metal | $35,039 | | | | | | |
| Miscellaneous articles of base metal | $9,736 | | | | | | |
| Total | $1,348,991 | $1,337,378 | $2,134,679 | $1,962,201 | $1,734,379 | $2,798,528 | $2,543,452 |
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