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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,228,026,040 | 209,033,414 | 209,033,414 |
| 2006 | $1,241,479,743 | 211,323,491 | 211,323,491 |
| 2007 | $1,167,378,789 | 142,940,191 | 142,940,191 |
| 2008 | $909,317,663 | 0 | 0 |
| 2009 | $521,018,645 | 65,222,844 | 65,222,844 |
| 2010 | $857,091,096 | 120,482,863 | 120,482,863 |
| 2011 | $960,844,371 | 135,275,943 | 135,275,943 |
Note: Quantity represents Weight in kilograms
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