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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $2,249,546,959 | 56,106,549 | 56,106,549 |
| 2006 | $2,541,326,119 | 68,817,480 | 68,817,480 |
| 2007 | $2,358,996,624 | 41,286,719 | 41,286,719 |
| 2008 | $729,358,126 | 18,997,711 | 18,997,711 |
| 2009 | $559,547,976 | 13,903,097 | 13,903,097 |
| 2010 | $591,039,418 | 17,988,328 | 17,988,328 |
| 2011 | $560,038,491 | 12,702,356 | 12,702,356 |
Note: Quantity represents Weight in kilograms
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