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| Chapter | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Iron and steel | $12,417,919 | $15,488,342 | $20,814,033 | $31,908,235 | $20,329,936 | $33,284,376 | $58,931,449 |
| Articles of iron or steel | $2,229,582 | $3,317,623 | $5,211,091 | $7,252,267 | $3,744,809 | $7,506,947 | $4,074,746 |
| Copper and articles thereof | $6,479,693 | $18,362,318 | $31,904,788 | $31,654,943 | $25,020,962 | $38,530,305 | $55,828,739 |
| Aluminum and articles thereof | $16,662,584 | $26,159,134 | $31,018,319 | $24,811,729 | $14,231,148 | $17,380,126 | $16,448,266 |
| Lead and articles thereof | $309,246 | $55,054 | $730,642 | $55,595 | $582,870 | $862,648 | $1,077,245 |
| Zinc and articles thereof | $37,731 | $128,650 | $627,661 | | $113,082 | $125,529 | $62,234 |
| Tin and articles thereof | | $2,525 | | | | | |
| Other base metals; cermets; articles thereof | | | $10,913 | | | | |
| Tools, implements, cutlery, spoons and forks, of base metal | $334,145 | $310,610 | $988,046 | $928,303 | $1,703,158 | $7,543,206 | $3,224,199 |
| Miscellaneous articles of base metal | $5,606,987 | $448,019 | $591,481 | $272,982 | $485,997 | $312,446 | $152,920 |
| Total | $44,077,887 | $64,272,275 | $91,896,974 | $96,884,054 | $66,211,962 | $105,545,583 | $139,799,798 |
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