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| Chapter | 2005 | 2006 | 2007 | 2008 |
| Iron and steel | $3,305,316 | $5,365,373 | $8,809,631 | $13,637,110 |
| Articles of iron or steel | $10,027,949 | $7,955,356 | $12,823,481 | $20,353,460 |
| Copper and articles thereof | $89,228,877 | $151,746,602 | $147,358,048 | $160,128,894 |
| Nickel and articles thereof | $911 | $8,390 | $6,779 | $19,209 |
| Aluminum and articles thereof | $1,703,810 | $1,128,499 | $1,421,540 | $1,462,557 |
| Lead and articles thereof | $117,450 | $32,694 | $82,705 | $46,319 |
| Zinc and articles thereof | $96,748,832 | $404,148,584 | $624,234,316 | $283,818,808 |
| Tin and articles thereof | $4,786,987 | $4,645,773 | $4,823,798 | $496,049 |
| Other base metals; cermets; articles thereof | $30,455 | $81,696 | $72,004 | $84,516 |
| Tools, implements, cutlery, spoons and forks, of base metal | $1,236,429 | $1,699,569 | $3,058,811 | $3,104,889 |
| Miscellaneous articles of base metal | $448,979 | $336,836 | $664,430 | $1,094,725 |
| Total | $207,635,995 | $577,149,372 | $803,355,543 | $484,246,536 |
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