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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $473,701,452 | 353,192,472 | 353,192,472 |
| 2006 | $703,734,846 | 417,423,681 | 417,423,681 |
| 2007 | $739,440,878 | 430,100,009 | 430,100,009 |
| 2008 | $727,966,519 | 403,892,402 | 403,892,402 |
| 2009 | $407,381,185 | 366,183,644 | 366,183,644 |
| 2010 | $681,656,171 | 444,106,385 | 444,106,385 |
| 2011 | $842,096,824 | 473,591,272 | 473,591,272 |
Note: Quantity represents Weight in kilograms
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