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| Chapter | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Iron and steel | $2,770,160 | $1,422,327 | $3,129,642 | $3,382,800 | $1,888,449 | $6,688,917 | $11,379,306 |
| Articles of iron or steel | $884,410 | $2,071,325 | $624,929 | $820,316 | $723,629 | $554,517 | $1,360,664 |
| Copper and articles thereof | $2,354,650 | $7,403,919 | $8,305,440 | $5,533,966 | $3,106,466 | $10,414,712 | $23,323,308 |
| Nickel and articles thereof | | | $17 | | | | |
| Aluminum and articles thereof | $1,457,290 | $2,033,104 | $2,179,928 | $4,174,415 | $1,603,920 | $2,989,028 | $3,344,004 |
| Lead and articles thereof | $515,730 | $756,721 | $1,118,366 | $2,100,750 | $873,232 | $631,698 | $370,565 |
| Zinc and articles thereof | $5,160 | $6,800 | | | $17,055 | | |
| Tin and articles thereof | $104,780,240 | $121,005,078 | $180,048,554 | $239,442,841 | $207,229,188 | $296,217,064 | $394,134,064 |
| Other base metals; cermets; articles thereof | $66,920 | $273,185 | $264,022 | $1,037,058 | $109,625 | $181,612 | $569,293 |
| Tools, implements, cutlery, spoons and forks, of base metal | $387,860 | $192,338 | $1,011 | $1,356 | $744 | $3,098 | $1,124 |
| Miscellaneous articles of base metal | $193,470 | $213,689 | $501,410 | $893,819 | $140,095 | $123,414 | $385,839 |
| Total | $113,415,890 | $135,378,486 | $196,173,319 | $257,387,321 | $215,692,403 | $317,804,060 | $434,868,167 |
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