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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $487,574,481 | 28,526,007 | 28,526,007 |
| 2006 | $457,336,276 | 26,756,892 | 26,756,892 |
| 2007 | $427,454,493 | 25,670,943 | 25,670,943 |
| 2008 | $381,153,968 | 19,568,550 | 19,568,550 |
| 2009 | $331,221,906 | 16,947,808 | 16,947,808 |
| 2010 | $389,329,183 | 34,869,802 | 34,869,802 |
| 2011 | $433,548,781 | 31,336,880 | 31,336,880 |
Note: Quantity represents Weight in kilograms
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