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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $26,841,663 | 744,755,020 | 744,755,020 |
| 2006 | $19,269,207 | 420,459,685 | 420,459,685 |
| 2007 | $8,091,385 | 211,722,900 | 211,722,900 |
| 2008 | $3,189,494 | 32,046,840 | 32,046,840 |
| 2009 | $81,136,594 | 1,461,859,661 | 1,461,859,661 |
| 2010 | $106,345,319 | 1,917,633,785 | 1,917,633,785 |
| 2011 | $52,363,450 | 906,292,950 | 906,292,950 |
Note: Quantity represents Weight in kilograms
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