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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $788,288,511 | 75,028 | 75,028 |
| 2006 | $425,621,365 | 31,327 | 31,327 |
| 2007 | $663,647,508 | 31,145 | 31,145 |
| 2008 | $1,082,109,619 | 39,110 | 39,110 |
| 2009 | $636,290,749 | 21,189 | 21,189 |
| 2010 | $974,523,885 | 24,824 | 24,824 |
Note: Quantity represents Weight in kilograms
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