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| Chapter | 2005 | 2006 | 2007 | 2008 | 2009 | 2011 |
| Iron and steel | $165,899,839 | $216,904,736 | $352,874,253 | $543,432,526 | $128,064,869 | $266,211,379 |
| Articles of iron or steel | $46,568,801 | $57,355,718 | $73,250,238 | $98,812,985 | $86,870,260 | $87,257,872 |
| Copper and articles thereof | $19,407,632 | $20,511,254 | $22,938,323 | $34,021,162 | $16,029,348 | $39,143,506 |
| Nickel and articles thereof | $25,304 | $39,468 | $125,508 | $167,567 | $128,375 | $223,674 |
| Aluminum and articles thereof | $23,575,991 | $37,019,868 | $50,143,229 | $54,320,765 | $36,308,557 | $48,625,865 |
| Lead and articles thereof | $1,344,129 | $1,372,413 | $1,162,156 | $224,717 | $257,168 | $1,800,534 |
| Zinc and articles thereof | $5,670,120 | $17,958,654 | $26,227,860 | $11,759,240 | $8,225,298 | $12,129,654 |
| Tin and articles thereof | $115,659 | $154,534 | $253,321 | $157,254 | $244,395 | $692,983 |
| Other base metals; cermets; articles thereof | $209,318 | $326,213 | $267,816 | $412,898 | $325,913 | $268,652 |
| Tools, implements, cutlery, spoons and forks, of base metal | $6,851,535 | $8,123,476 | $9,984,804 | $12,862,557 | $9,962,689 | $10,762,119 |
| Miscellaneous articles of base metal | $15,451,953 | $18,637,529 | $24,275,516 | $30,398,667 | $25,261,125 | $26,852,704 |
| Total | $285,120,281 | $378,403,863 | $561,503,024 | $786,570,338 | $311,677,997 | $493,968,942 |
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