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| Chapter | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Iron and steel | $150,954,780 | $189,649,617 | $276,104,037 | $365,003,370 | $162,782,717 | $255,548,911 | $376,289,690 |
| Articles of iron or steel | $193,917,941 | $243,044,151 | $329,133,137 | $431,671,425 | $335,980,728 | $368,252,266 | $485,175,094 |
| Copper and articles thereof | $13,899,833 | $20,561,036 | $22,317,939 | $23,295,895 | $14,673,397 | $21,670,236 | $71,463,421 |
| Nickel and articles thereof | $372,315 | $563,969 | $1,696,090 | $5,351,744 | $1,373,253 | $2,376,720 | $4,780,360 |
| Aluminum and articles thereof | $27,236,237 | $33,874,428 | $47,726,408 | $50,447,914 | $37,495,725 | $64,810,461 | $86,818,151 |
| Lead and articles thereof | $4,122,703 | $4,925,790 | $19,955,903 | $10,504,200 | $6,407,563 | $9,471,981 | $10,570,166 |
| Zinc and articles thereof | $229,659 | $1,219,400 | $713,254 | $553,960 | $803,085 | $751,153 | $1,317,081 |
| Tin and articles thereof | $99,789 | $42,550 | $410,072 | $117,484 | $17,261 | $48,413 | $233,639 |
| Other base metals; cermets; articles thereof | $862,195 | $512,872 | $188,842 | $114,477 | $435,986 | $594,738 | $817,957 |
| Tools, implements, cutlery, spoons and forks, of base metal | $13,775,578 | $11,599,241 | $16,970,500 | $19,863,968 | $13,405,423 | $18,445,069 | $19,772,586 |
| Miscellaneous articles of base metal | $51,959,531 | $68,373,119 | $75,992,312 | $68,253,952 | $54,687,473 | $64,922,918 | $80,482,608 |
| Total | $457,430,561 | $574,366,173 | $791,208,494 | $975,178,389 | $628,062,611 | $806,892,866 | $1,137,720,753 |
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