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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $91,496,165 | 1,561,473,094 | 1,561,473,094 |
| 2006 | $94,508,235 | 1,489,882,244 | 1,489,882,244 |
| 2007 | $111,436,051 | 1,636,531,015 | 1,636,531,015 |
| 2008 | $169,606,148 | 1,593,581,118 | 1,593,581,118 |
| 2009 | $78,558,099 | 864,652,668 | 864,652,668 |
| 2010 | $210,733,372 | 1,721,278,738 | 1,721,278,738 |
| 2011 | $276,888,610 | 1,951,389,493 | 1,951,389,493 |
Note: Quantity represents Weight in kilograms
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