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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $14,000 | 2,941 | 2,941 |
| 2006 | $43,000 | 9,032 | 9,032 |
| 2008 | $347,001,000 | 300,076,966 | 300,076,966 |
| 2009 | $219,531,000 | 185,140,803 | 185,140,803 |
| 2010 | $283,669,000 | 291,546,757 | 291,546,757 |
| 2011 | $300,848,000 | 191,011,057 | 191,011,057 |
Note: Quantity represents Weight in kilograms
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