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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $196,392,262 | 484,471,640 | 484,471,640 |
| 2006 | $500,580,872 | 532,861,032 | 532,861,032 |
| 2007 | $450,899,808 | 359,520,391 | 359,520,391 |
| 2008 | $273,174,129 | 430,616,880 | 430,616,880 |
| 2009 | $203,975,109 | 320,567,734 | 320,567,734 |
| 2010 | $227,747,214 | 391,049,742 | 391,049,742 |
Note: Quantity represents Weight in kilograms
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