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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $669,656,996 | 20,049,176 | 20,049,176 |
| 2006 | $1,634,907,917 | 37,680,463 | 37,680,463 |
| 2007 | $2,492,420,150 | 49,684,617 | 49,684,617 |
| 2008 | $2,423,359,737 | 52,781,536 | 52,781,536 |
| 2009 | $598,508,146 | 20,004,076 | 20,004,076 |
| 2010 | $563,184,172 | 17,518,207 | 17,518,207 |
Note: Quantity represents Weight in kilograms
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