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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $202,665,873 | 1,767,651,084 | 1,767,651,084 |
| 2006 | $158,077,066 | 1,267,876,830 | 1,267,876,830 |
| 2007 | $416,483,071 | 1,872,761,724 | 1,872,761,724 |
| 2008 | $323,947,050 | 1,496,094,927 | 1,496,094,927 |
| 2009 | $439,202,022 | 3,490,024,139 | 3,490,024,139 |
| 2010 | $197,094,777 | 1,541,612,795 | 1,541,612,795 |
| 2011 | $491,042,205 | 2,068,620,317 | 2,068,620,317 |
Note: Quantity represents Weight in kilograms
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