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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $7,912 | 1,021 | 1,021 |
| 2008 | $509,649,783 | 5,525,542,001 | 5,525,542,001 |
| 2009 | $163,878,466 | 3,686,850,000 | 3,686,850,000 |
| 2010 | $557,460,545 | 5,073,663,000 | 5,073,663,000 |
| 2011 | $421,789,806 | 4,965,352,000 | 4,965,352,000 |
Note: Quantity represents Weight in kilograms
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