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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $540,823,341 | 956,592,721 | 956,592,721 |
| 2006 | $760,291,061 | 1,075,353,412 | 1,075,353,412 |
| 2007 | $844,080,080 | 1,019,793,693 | 1,019,793,693 |
| 2008 | $703,136,704 | 0 | 0 |
| 2009 | $586,003,357 | 859,372,836 | 859,372,836 |
| 2010 | $524,848,684 | 715,897,733 | 715,897,733 |
| 2011 | $662,636,065 | 672,516,646 | 672,516,646 |
Note: Quantity represents Weight in kilograms
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