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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $797,624,000 | 1,338,266,678 | 1,338,266,678 |
| 2006 | $861,983,000 | 1,353,471,900 | 1,353,471,900 |
| 2007 | $864,859,000 | 1,204,866,800 | 1,204,866,800 |
| 2008 | $866,974,000 | 1,154,481,300 | 1,154,481,300 |
| 2009 | $735,791,000 | 1,019,823,786 | 1,019,823,786 |
| 2010 | $602,203,439 | 1,068,440,300 | 1,068,440,300 |
| 2011 | $822,411,390 | 1,211,323,696 | 1,211,323,696 |
Note: Quantity represents Weight in kilograms
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