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| Chapter | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Iron and steel | $169,628,048 | $225,711,706 | $338,305,120 | $413,529,240 | $279,555,662 | $354,030,793 | $440,089,020 |
| Articles of iron or steel | $122,156,745 | $185,710,255 | $290,545,564 | $378,536,142 | $259,386,936 | $252,501,337 | $302,483,306 |
| Copper and articles thereof | $231,153,760 | $427,858,829 | $442,923,917 | $460,996,385 | $313,063,873 | $505,987,370 | $646,735,152 |
| Nickel and articles thereof | $208,037 | $403,355 | $653,228 | $628,451 | $57,818 | $88,645 | $494,711 |
| Aluminum and articles thereof | $128,639,458 | $236,875,912 | $364,033,811 | $360,246,153 | $226,764,279 | $306,640,501 | $450,892,689 |
| Lead and articles thereof | $2,706,866 | $4,726,537 | $12,828,696 | $12,441,007 | $9,048,917 | $10,165,623 | $19,246,425 |
| Zinc and articles thereof | $12,454,513 | $16,157,837 | $4,056,574 | $1,878,260 | $555,947 | $992,981 | $176,932 |
| Tin and articles thereof | $4,315,314 | $4,059,758 | $7,182,059 | $13,469,704 | $6,906,741 | $11,284,652 | $16,009,012 |
| Other base metals; cermets; articles thereof | $1,027,471 | $551,320 | $2,878,339 | $2,107,511 | $3,661,206 | $3,084,293 | $5,648,930 |
| Tools, implements, cutlery, spoons and forks, of base metal | $10,692,184 | $13,400,193 | $17,608,071 | $21,306,795 | $14,131,534 | $14,510,511 | $19,448,933 |
| Miscellaneous articles of base metal | $9,071,934 | $14,567,953 | $21,950,305 | $27,303,814 | $20,892,938 | $30,907,339 | $42,454,432 |
| Total | $692,054,330 | $1,130,023,655 | $1,502,965,684 | $1,692,443,462 | $1,134,025,851 | $1,490,194,045 | $1,943,679,542 |
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