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| Year | Trade Value | Weight (kg) | Quantity |
| 2006 | $157 | 40 | 40 |
| 2007 | $787,262,547 | 68,029,368 | 68,029,368 |
| 2008 | $678,758,893 | 66,110,956 | 66,110,956 |
| 2009 | $425,023,319 | 86,245,712 | 86,245,712 |
| 2010 | $512,469,790 | 62,610,709 | 62,610,709 |
| 2011 | $354,579,392 | 40,611,198 | 40,611,198 |
Note: Quantity represents Weight in kilograms
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