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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $432,581,823 | 7,317,013 | 7,317,013 |
| 2006 | $700,125,089 | 5,123,055 | 5,123,055 |
| 2007 | $929,063,864 | 6,593,831 | 6,593,831 |
| 2008 | $1,100,639,610 | 8,015,389 | 8,015,389 |
| 2009 | $940,868,233 | 6,675,887 | 6,675,887 |
| 2010 | $1,020,671,989 | 6,535,709 | 6,535,709 |
| 2011 | $1,108,054,729 | 6,409,705 | 6,409,705 |
Note: Quantity represents Weight in kilograms
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