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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $4,647,748,691 | 328,021 | 328,021 |
| 2006 | $7,183,811,736 | 394,099 | 394,099 |
| 2007 | $11,543,268,526 | 522,017 | 522,017 |
| 2008 | $16,415,611,898 | 794,604 | 794,604 |
| 2009 | $11,986,150,808 | 388,580 | 388,580 |
| 2010 | $15,045,131,069 | 398,483 | 398,483 |
| 2011 | $24,369,131,966 | 517,455 | 517,455 |
Note: Quantity represents Weight in kilograms
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