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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,424,484,735 | 401,176,985 | 401,176,985 |
| 2006 | $2,354,577,997 | 357,158,023 | 357,158,023 |
| 2007 | $2,446,550,736 | 348,471,900 | 348,471,900 |
| 2008 | $2,428,054,850 | 342,780,036 | 342,780,036 |
| 2009 | $1,373,384,273 | 308,659,749 | 308,659,749 |
Note: Quantity represents Weight in kilograms
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