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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $2,197,114,500 | 8,287,512,000 | 8,287,512,000 |
| 2006 | $3,096,769,554 | 8,850,350,719 | 8,850,350,719 |
| 2007 | $3,547,032,453 | 9,512,726,420 | 9,512,726,420 |
| 2008 | $5,087,090,265 | 10,716,074,049 | 10,716,074,049 |
| 2009 | $3,011,945,550 | 8,190,867,255 | 8,190,867,255 |
| 2010 | $2,885,167,903 | 8,162,815,913 | 8,162,815,913 |
Note: Quantity represents Weight in kilograms
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