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| Chapter | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Iron and steel | $37,585,434 | $33,956,205 | $104,714,214 | $96,245,601 | $60,269,137 | $78,907,722 | $91,758,427 |
| Articles of iron or steel | $44,737,966 | $69,215,705 | $91,317,530 | $106,477,610 | $104,423,553 | $77,332,358 | $84,425,357 |
| Copper and articles thereof | $7,835,921 | $10,511,871 | $14,564,636 | $20,016,654 | $12,774,800 | $9,953,421 | $10,744,367 |
| Nickel and articles thereof | $16,182 | $5,006 | $4,322 | $6,055 | $37,304 | $9,534 | $12,272 |
| Aluminum and articles thereof | $11,529,246 | $13,679,980 | $16,086,121 | $19,724,341 | $20,972,575 | $12,387,883 | $13,985,016 |
| Lead and articles thereof | $332,547 | $521,695 | $402,619 | $861,100 | $256,298 | $34,627 | $77,089 |
| Zinc and articles thereof | $211,918 | $215,930 | $275,397 | $1,334,557 | $321,211 | $332,644 | $267,976 |
| Tin and articles thereof | $18,793 | $30,089 | $115,164 | $213,014 | $42,363 | $34,651 | $82,438 |
| Other base metals; cermets; articles thereof | $49,225 | $11,844 | $13,128 | $3,714 | $74,969 | $28,536 | $12,402 |
| Tools, implements, cutlery, spoons and forks, of base metal | $4,690,871 | $4,958,242 | $6,248,889 | $11,982,474 | $8,033,250 | $6,376,966 | $9,481,428 |
| Miscellaneous articles of base metal | $8,535,166 | $8,706,600 | $10,419,041 | $12,343,096 | $12,777,203 | $8,619,885 | $8,899,015 |
| Total | $115,543,269 | $141,813,167 | $244,161,061 | $269,208,216 | $219,982,663 | $194,018,227 | $219,745,787 |
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