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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $4,040,622,178 | 505,640,320 | 505,640,320 |
| 2006 | $3,901,429,681 | 488,221,879 | 488,221,879 |
| 2007 | $4,124,377,869 | 538,940,401 | 538,940,401 |
| 2008 | $2,941,330,895 | 374,066,658 | 374,066,658 |
| 2009 | $1,539,699,027 | 172,676,698 | 172,676,698 |
| 2010 | $2,474,063,431 | 287,876,829 | 287,876,829 |
| 2011 | $2,766,029,656 | 328,992,369 | 328,992,369 |
Note: Quantity represents Weight in kilograms
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