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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $230,193,897 | 1,831,874,046 | 1,831,874,046 |
| 2006 | $158,181,857 | 1,663,243,500 | 1,663,243,500 |
| 2007 | $467,483,156 | 1,502,359,723 | 1,502,359,723 |
| 2008 | $1,517,772,020 | 2,003,390,498 | 2,003,390,498 |
| 2009 | $374,072,297 | 885,846,539 | 885,846,539 |
| 2010 | $649,760,440 | 1,297,934,195 | 1,297,934,195 |
| 2011 | $496,851,726 | 1,204,411,820 | 1,204,411,820 |
Note: Quantity represents Weight in kilograms
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