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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $112,100,000 | 157,453,537 | 157,453,537 |
| 2006 | $104,935,000 | 183,214,900 | 183,214,900 |
| 2007 | $157,107,000 | 243,408,688 | 243,408,688 |
| 2008 | $316,912,000 | 390,167,693 | 390,167,693 |
| 2009 | $252,948,000 | 441,281,534 | 441,281,534 |
| 2010 | $263,493,566 | 478,718,949 | 478,718,949 |
| 2011 | $285,638,346 | 360,686,392 | 360,686,392 |
Note: Quantity represents Weight in kilograms
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