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| Chapter | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Iron and steel | $124,755 | $79,273 | $1,181,830 | $2,118,470 | $2,099,901 | $1,942,997 | $4,268,679 |
| Articles of iron or steel | $2,669,199 | $2,632,925 | $2,254,467 | $1,850,081 | $1,631,802 | $1,733,200 | $4,474,350 |
| Copper and articles thereof | $295,351 | $923,979 | $1,333,462 | $312,477 | $470,480 | $1,250,187 | $1,586,386 |
| Aluminum and articles thereof | $973,860 | $1,805,564 | $2,060,748 | $2,728,196 | $572,611 | $1,449,528 | $1,830,963 |
| Lead and articles thereof | | | $44,604 | | | $48,750 | $55,000 |
| Zinc and articles thereof | $5,461 | $1,291 | $47,909 | | | | $634 |
| Tin and articles thereof | | $50 | | | | | |
| Tools, implements, cutlery, spoons and forks, of base metal | $66,301 | $320,908 | $152,808 | $140,230 | $200,316 | $52,989 | $420,286 |
| Miscellaneous articles of base metal | $1,683 | $3,450 | $21,952 | $1,297 | $8,985 | $3,617 | $102,175 |
| Total | $4,136,610 | $5,767,440 | $7,097,780 | $7,150,751 | $4,984,095 | $6,481,268 | $12,738,473 |
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