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| Chapter | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Iron and steel | $61,709,067 | $123,845,284 | $177,950,540 | $181,425,597 | $209,474,024 | $225,025,678 | $283,640,965 |
| Articles of iron or steel | $55,332,748 | $75,496,361 | $100,116,998 | $194,368,414 | $137,412,372 | $160,275,894 | $161,124,969 |
| Copper and articles thereof | $3,672,048 | $5,987,657 | $7,730,365 | $7,428,102 | $4,940,099 | $4,863,720 | $5,284,706 |
| Nickel and articles thereof | $150,652 | $131,631 | $58,735 | $56,432 | $56,780 | $90,016 | $83,399 |
| Aluminum and articles thereof | $48,582,725 | $59,687,654 | $76,257,139 | $87,396,354 | $67,112,180 | $60,997,809 | $66,340,564 |
| Lead and articles thereof | $40,489 | $119,111 | $105,486 | $109,845 | $454,010 | $205,149 | $114,253 |
| Zinc and articles thereof | $563,670 | $1,036,363 | $1,185,457 | $1,875,697 | $1,238,404 | $1,160,459 | $1,420,057 |
| Tin and articles thereof | $17,921 | $16,145 | $24,832 | $47,390 | $28,050 | $18,305 | $35,280 |
| Other base metals; cermets; articles thereof | $31,940 | $34,432 | $63,922 | $16,649 | $13,160 | $44,188 | $78,965 |
| Tools, implements, cutlery, spoons and forks, of base metal | $6,179,786 | $7,218,662 | $9,197,704 | $10,080,637 | $10,789,840 | $11,240,269 | $11,792,765 |
| Miscellaneous articles of base metal | $39,292,737 | $52,764,297 | $75,519,667 | $81,723,805 | $72,470,841 | $73,333,850 | $71,375,906 |
| Total | $215,573,783 | $326,337,597 | $448,210,845 | $564,528,922 | $503,989,760 | $537,255,337 | $601,291,829 |
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