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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $542,300,209 | 1,727,915,177 | 1,727,915,177 |
| 2006 | $525,917,983 | 1,766,243,470 | 1,766,243,470 |
| 2007 | $811,002,547 | 2,224,375,228 | 2,224,375,228 |
| 2008 | $1,236,740,028 | 2,223,579,021 | 2,223,579,021 |
| 2009 | $285,162,934 | 895,505,956 | 895,505,956 |
| 2010 | $454,581,729 | 1,004,472,118 | 1,004,472,118 |
| 2011 | $670,725,377 | 1,273,760,967 | 1,273,760,967 |
Note: Quantity represents Weight in kilograms
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