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| Chapter | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Iron and steel | $213,931,312 | $262,448,961 | $467,860,964 | $553,747,899 | $281,667,887 | $352,241,040 | $331,410,435 |
| Articles of iron or steel | $237,148,859 | $272,344,100 | $466,243,431 | $543,349,319 | $306,990,929 | $353,648,845 | $526,683,199 |
| Copper and articles thereof | $159,536,870 | $179,825,414 | $291,123,842 | $283,607,246 | $159,009,699 | $339,441,387 | $415,721,693 |
| Nickel and articles thereof | $2,631,970 | $2,999,435 | $7,787,225 | $6,065,166 | $2,385,041 | $3,988,072 | $3,315,315 |
| Aluminum and articles thereof | $179,645,534 | $315,474,496 | $432,159,198 | $435,012,850 | $230,692,397 | $300,711,178 | $394,858,188 |
| Lead and articles thereof | $6,127,644 | $4,764,240 | $7,617,779 | $7,930,390 | $8,662,582 | $15,153,731 | $19,100,937 |
| Zinc and articles thereof | $8,198,708 | $17,296,515 | $24,442,765 | $20,628,562 | $8,284,448 | $11,943,172 | $14,355,545 |
| Tin and articles thereof | $12,467,651 | $11,982,744 | $17,787,565 | $30,692,826 | $16,000,345 | $25,809,249 | $35,761,653 |
| Other base metals; cermets; articles thereof | $4,193,209 | $5,346,008 | $9,882,669 | $18,581,085 | $10,867,421 | $10,112,979 | $13,289,822 |
| Tools, implements, cutlery, spoons and forks, of base metal | $41,466,162 | $50,947,445 | $75,827,087 | $83,719,798 | $44,517,233 | $44,295,851 | $53,463,332 |
| Miscellaneous articles of base metal | $54,549,970 | $72,372,380 | $103,168,515 | $125,127,623 | $76,549,306 | $77,113,979 | $90,456,528 |
| Total | $919,897,889 | $1,195,801,738 | $1,903,901,040 | $2,108,462,764 | $1,145,627,288 | $1,534,459,483 | $1,898,416,647 |
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