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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $949,967,406 | 3,714,009,201 | 3,714,009,201 |
| 2006 | $926,092,593 | 3,765,610,483 | 3,765,610,483 |
| 2007 | $1,176,991,688 | 3,610,902,088 | 3,610,902,088 |
| 2008 | $1,800,950,216 | 3,507,196,088 | 3,507,196,088 |
| 2009 | $1,419,117,316 | 3,425,919,436 | 3,425,919,436 |
| 2010 | $1,591,499,918 | 3,772,163,084 | 3,772,163,084 |
| 2011 | $1,762,083,619 | 3,340,376,172 | 3,340,376,172 |
Note: Quantity represents Weight in kilograms
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