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| Chapter | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
| Iron and steel | $62,659,585 | $66,946,184 | $96,826,628 | $102,283,716 | $136,512,664 | $148,992,169 |
| Articles of iron or steel | $55,312,525 | $67,939,171 | $96,583,476 | $131,328,181 | $119,111,127 | $146,418,635 |
| Copper and articles thereof | $13,263,895 | $27,680,914 | $38,099,028 | $39,912,827 | $27,216,695 | $37,094,352 |
| Nickel and articles thereof | $256,365 | $241,441 | $409,668 | $224,611 | $261,887 | $352,175 |
| Aluminum and articles thereof | $44,697,284 | $63,300,654 | $92,491,263 | $82,198,521 | $75,086,828 | $71,864,818 |
| Lead and articles thereof | $623,286 | $931,633 | $678,095 | $1,436,696 | $1,660,205 | $1,179,565 |
| Zinc and articles thereof | $20,494,097 | $41,067,854 | $51,175,957 | $29,305,782 | $21,864,525 | $34,877,527 |
| Tin and articles thereof | $466,881 | $270,859 | $768,491 | $737,807 | $762,797 | $199,380 |
| Other base metals; cermets; articles thereof | $212,626 | $609,367 | $930,381 | $487,123 | $191,878 | $156,861 |
| Tools, implements, cutlery, spoons and forks, of base metal | $12,643,228 | $19,330,865 | $24,390,631 | $20,693,451 | $18,484,678 | $25,489,913 |
| Miscellaneous articles of base metal | $19,581,223 | $32,029,706 | $58,093,017 | $42,020,264 | $38,124,312 | $42,398,530 |
| Total | $230,210,995 | $320,348,648 | $460,446,635 | $450,628,979 | $439,277,596 | $509,023,925 |
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