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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $570,316,329 | 48,358,770 | 48,358,770 |
| 2006 | $588,368,958 | 53,712,025 | 53,712,025 |
| 2007 | $651,159,832 | 57,972,784 | 57,972,784 |
| 2008 | $611,709,137 | 57,487,687 | 57,487,687 |
| 2009 | $480,151,309 | 43,264,160 | 43,264,160 |
| 2010 | $664,529,695 | 60,189,965 | 60,189,965 |
| 2011 | $744,232,713 | 59,852,102 | 59,852,102 |
Note: Quantity represents Weight in kilograms
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