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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $611,706,217 | 502,815,847 | 502,815,847 |
| 2006 | $514,851,168 | 377,105,087 | 377,105,087 |
| 2007 | $450,937,784 | 295,414,742 | 295,414,742 |
| 2008 | $502,191,308 | 324,797,199 | 324,797,199 |
| 2009 | $449,807,729 | 351,074,599 | 351,074,599 |
| 2010 | $580,988,876 | 368,119,961 | 368,119,961 |
| 2011 | $697,356,187 | 354,033,044 | 354,033,044 |
Note: Quantity represents Weight in kilograms
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