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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $833,441,411 | 1,197,129,289 | 1,197,129,289 |
| 2006 | $775,962,578 | 1,007,724,669 | 1,007,724,669 |
| 2007 | $586,826,274 | 0 | 0 |
| 2008 | $332,467,256 | 416,938,057 | 416,938,057 |
| 2009 | $255,336,128 | 305,520,143 | 305,520,143 |
| 2010 | $189,419,455 | 250,552,444 | 250,552,444 |
| 2011 | $111,665,172 | 150,732,019 | 150,732,019 |
Note: Quantity represents Weight in kilograms
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