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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $402 | 419 | 419 |
| 2006 | $272 | 284 | 284 |
| 2007 | $130,140 | 46,000 | 46,000 |
| 2009 | $284,402,349 | 354,737,000 | 354,737,000 |
| 2010 | $415,392,293 | 421,757,000 | 421,757,000 |
| 2011 | $734,124,046 | 780,717,575 | 780,717,575 |
Note: Quantity represents Weight in kilograms
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