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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $419,085,000 | 55,967,100 | 55,967,100 |
| 2006 | $403,781,000 | 53,996,900 | 53,996,900 |
| 2007 | $424,340,000 | 53,355,500 | 53,355,500 |
| 2008 | $600,293,000 | 55,625,000 | 55,625,000 |
| 2009 | $536,745,000 | 57,159,500 | 57,159,500 |
| 2010 | $533,718,748 | 57,868,500 | 57,868,500 |
| 2011 | $691,646,557 | 61,516,503 | 61,516,503 |
Note: Quantity represents Weight in kilograms
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