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| Chapter | 2005 | 2009 | 2010 | 2011 |
| Iron and steel | | $170,625 | $238,058 | $1,667,333 |
| Articles of iron or steel | $163,314 | $2,890,569 | $1,692,418 | $1,091,581 |
| Copper and articles thereof | $12,019 | $13,245 | $9,589 | $288,723 |
| Aluminum and articles thereof | $11,421 | $315,697 | $517,018 | $321,026 |
| Lead and articles thereof | $47 | $709 | $20 | |
| Zinc and articles thereof | | $140 | | $108 |
| Tools, implements, cutlery, spoons and forks, of base metal | | $466,837 | $281,787 | $332,487 |
| Miscellaneous articles of base metal | $46,062 | $554,684 | $33,264 | $50,971 |
| Total | $232,863 | $4,412,506 | $2,772,154 | $3,752,229 |
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