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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $521,155,649 | 3,733,376,256 | 3,733,376,256 |
| 2006 | $512,614,122 | 3,143,466,784 | 3,143,466,784 |
| 2007 | $493,484,920 | 1,927,303,185 | 1,927,303,185 |
| 2008 | $485,034,745 | 926,872,262 | 926,872,262 |
| 2009 | $497,369,977 | 813,553,089 | 813,553,089 |
| 2010 | $189,922,582 | 369,112,212 | 369,112,212 |
| 2011 | $79,049,138 | 115,699,898 | 115,699,898 |
Note: Quantity represents Weight in kilograms
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