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| Chapter | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Iron and steel | $21,269,928 | $17,530,441 | $23,224,486 | $36,990,473 | $20,960,505 | $40,236,641 | $55,867,983 |
| Articles of iron or steel | $2,174,403 | $23,301,571 | $24,641,518 | $32,534,081 | $24,326,900 | $31,893,204 | $39,460,492 |
| Copper and articles thereof | $4,861,209 | $9,782,883 | $7,924,617 | $8,983,927 | $9,758,668 | $23,619,938 | $28,161,321 |
| Nickel and articles thereof | $2,000 | $9,831 | $27,806 | $90 | $44,242 | $149,221 | $284,490 |
| Aluminum and articles thereof | $11,360,315 | $23,559,991 | $24,766,778 | $24,928,440 | $16,637,550 | $22,915,657 | $30,329,880 |
| Lead and articles thereof | $803,805 | $94,180 | $122,102 | $1,638,161 | $371,459 | $1,341,733 | $915,492 |
| Zinc and articles thereof | | $439,061 | $535,929 | $147,223 | $181,142 | $57,719 | $6,938 |
| Tin and articles thereof | | $43,817 | $84,446 | $9,015 | $57,108 | $51,032 | $499,238 |
| Other base metals; cermets; articles thereof | | $2,355 | $3,140 | $6,798 | | $1,812 | $40,443 |
| Tools, implements, cutlery, spoons and forks, of base metal | | $51,699,467 | $63,330,346 | $76,995,572 | $58,404,172 | $65,113,767 | $96,958,627 |
| Miscellaneous articles of base metal | $279,029 | $36,083,115 | $37,165,091 | $59,177,294 | $42,544,465 | $56,627,017 | $65,539,279 |
| Total | $40,750,689 | $162,546,712 | $181,826,259 | $241,411,074 | $173,286,211 | $242,007,741 | $318,064,183 |
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