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| Chapter | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Iron and steel | $168,814,164 | $186,085,882 | $293,605,116 | $345,754,470 | $108,053,018 | $136,989,477 | $177,499,771 |
| Articles of iron or steel | $178,595,488 | $185,700,800 | $263,334,576 | $447,460,552 | $229,804,465 | $222,118,991 | $263,729,092 |
| Copper and articles thereof | $33,735,772 | $53,459,007 | $69,341,386 | $77,150,184 | $54,137,115 | $63,249,233 | $72,871,306 |
| Nickel and articles thereof | $915,369 | $2,332,745 | $5,822,288 | $2,461,191 | $830,442 | $1,413,633 | $1,786,831 |
| Aluminum and articles thereof | $56,459,177 | $84,174,286 | $141,273,614 | $150,313,418 | $110,948,667 | $120,110,399 | $150,901,721 |
| Lead and articles thereof | $551,266 | $847,658 | $1,162,850 | $930,921 | $550,775 | $1,540,238 | $671,011 |
| Zinc and articles thereof | $3,287,072 | $8,551,801 | $11,308,480 | $7,850,858 | $4,030,856 | $7,593,010 | $7,909,674 |
| Tin and articles thereof | $239,854 | $250,667 | $418,546 | $634,329 | $277,460 | $357,140 | $501,361 |
| Other base metals; cermets; articles thereof | $1,439,707 | $1,099,284 | $1,109,932 | $2,511,195 | $1,562,826 | $2,570,513 | $2,647,614 |
| Tools, implements, cutlery, spoons and forks, of base metal | $28,672,354 | $28,309,381 | $38,891,926 | $47,671,041 | $33,642,997 | $36,952,245 | $43,121,844 |
| Miscellaneous articles of base metal | $51,832,126 | $58,524,164 | $80,086,781 | $93,802,264 | $70,590,004 | $80,949,437 | $90,072,084 |
| Total | $524,542,349 | $609,335,675 | $906,355,495 | $1,176,540,423 | $614,428,625 | $673,844,316 | $811,712,309 |
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