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| Chapter | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Iron and steel | $161,072,480 | $262,942,009 | $258,974,361 | $311,075,900 | $104,285,630 | $74,092,568 | $50,213,372 |
| Articles of iron or steel | $6,345,193 | $1,531,919 | $3,470,623 | $7,166,260 | $1,938,296 | $2,996,431 | $1,413,336 |
| Copper and articles thereof | $50,556,431 | $105,754,282 | $82,148,412 | $87,958,298 | $3,870,561 | $2,642,349 | $1,258,514 |
| Aluminum and articles thereof | $8,203,169 | $27,300,365 | $10,012,924 | $20,067,556 | $2,899,890 | $7,869,726 | $1,475,019 |
| Lead and articles thereof | $73,944 | $502,737 | $716,619 | $8,455,165 | $4,747,297 | $8,735,697 | $414,060 |
| Zinc and articles thereof | $38,418,588 | $84,387,804 | $63,079,427 | $53,801,955 | $36,764,217 | $61,417,505 | $36,224,298 |
| Tin and articles thereof | | | $130,815 | | | | |
| Tools, implements, cutlery, spoons and forks, of base metal | $127,016 | $100,249 | $269,990 | $226,950 | $83,893 | $77,091 | $371,616 |
| Miscellaneous articles of base metal | $79,936 | $52,998 | $85,057 | $397,698 | $246,365 | $424,565 | $312,244 |
| Total | $264,876,757 | $482,572,363 | $418,888,228 | $489,149,782 | $154,836,149 | $158,255,932 | $91,682,459 |
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