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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $753,836,725 | 48,478,246 | 48,478,246 |
| 2006 | $720,115,955 | 36,767,623 | 36,767,623 |
| 2007 | $718,747,092 | 26,925,640 | 26,925,640 |
| 2008 | $624,639,383 | 19,618,706 | 19,618,706 |
| 2009 | $371,530,757 | 13,052,174 | 13,052,174 |
| 2010 | $425,833,722 | 12,215,965 | 12,215,965 |
| 2011 | $385,292,274 | 10,290,040 | 10,290,040 |
Note: Quantity represents Weight in kilograms
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