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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,296,517,503 | 4,047,500 | 4,047,500 |
| 2006 | $506,052,299 | 4,150,496 | 4,150,496 |
| 2007 | $1,588,468,719 | 13,097,457 | 13,097,457 |
| 2008 | $766,235,481 | 4,447,451 | 4,447,451 |
| 2009 | $357,630,665 | 4,890,171 | 4,890,171 |
| 2010 | $690,395,637 | 5,945,191 | 5,945,191 |
| 2011 | $864,182,431 | 6,656,250 | 6,656,250 |
Note: Quantity represents Weight in kilograms
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