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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $628,213,049 | 443,476,487 | 443,476,487 |
| 2006 | $672,745,644 | 275,266,344 | 275,266,344 |
| 2007 | $305,192,871 | 118,313,621 | 118,313,621 |
| 2008 | $210,697,738 | 84,437,504 | 84,437,504 |
| 2009 | $169,361,092 | 77,614,955 | 77,614,955 |
| 2010 | $166,176,047 | 84,916,784 | 84,916,784 |
| 2011 | $173,154,596 | 89,776,153 | 89,776,153 |
Note: Quantity represents Weight in kilograms
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