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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $811,369,327 | 905,169,718 | 905,169,718 |
| 2006 | $977,569,866 | 973,221,321 | 973,221,321 |
| 2007 | $1,007,105,057 | 939,746,303 | 939,746,303 |
| 2011 | $1,470,088,316 | 1,127,593,881 | 1,127,593,881 |
Note: Quantity represents Weight in kilograms
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