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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,020,548,586 | 567,455,213 | 567,455,213 |
| 2006 | $1,401,314,661 | 779,172,417 | 779,172,417 |
| 2007 | $1,515,924,885 | 613,733,734 | 613,733,734 |
| 2010 | $1,159,636,909 | 645,658,435 | 645,658,435 |
| 2011 | $276,103,000 | 135,323,465 | 135,323,465 |
Note: Quantity represents Weight in kilograms
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