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| Chapter | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Iron and steel | $136,560,651 | $152,331,322 | $184,615,290 | $215,136,542 | $127,935,458 | $160,968,149 | $263,208,764 |
| Articles of iron or steel | $136,809,551 | $157,927,076 | $177,971,299 | $252,276,856 | $217,109,589 | $215,944,778 | $279,276,207 |
| Copper and articles thereof | $152,909,340 | $154,497,643 | $96,851,833 | $97,142,487 | $52,946,519 | $94,330,470 | $122,839,572 |
| Nickel and articles thereof | $65,010 | $79,693 | $129,114 | $82,062 | $57,208 | $213,900 | $680,690 |
| Aluminum and articles thereof | $81,919,997 | $78,789,106 | $49,746,149 | $57,271,665 | $49,687,187 | $58,461,713 | $76,622,542 |
| Lead and articles thereof | $7,153,002 | $9,132,957 | $14,634,241 | $14,747,816 | $8,525,638 | $14,853,157 | $13,078,695 |
| Zinc and articles thereof | $6,342,429 | $7,340,214 | $8,068,991 | $3,479,229 | $3,261,508 | $4,572,219 | $4,879,670 |
| Tin and articles thereof | $3,560,848 | $668,566 | $196,993 | $363,053 | $516,799 | $475,779 | $232,523 |
| Other base metals; cermets; articles thereof | $241,428 | $167,572 | $120,139 | $317,519 | $271,295 | $963,967 | $1,236,312 |
| Tools, implements, cutlery, spoons and forks, of base metal | $21,299,847 | $22,170,085 | $24,045,042 | $23,918,078 | $20,504,350 | $27,315,249 | $43,355,705 |
| Miscellaneous articles of base metal | $38,478,200 | $42,968,521 | $48,025,036 | $56,576,812 | $41,757,417 | $55,296,997 | $70,726,480 |
| Total | $585,340,303 | $626,072,755 | $604,404,127 | $721,312,119 | $522,572,968 | $633,396,378 | $876,137,160 |
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