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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,316,147,662 | 4,050,702 | 4,050,702 |
| 2006 | $889,422,500 | 5,173,987 | 5,173,987 |
| 2007 | $1,757,421,096 | 4,206,176 | 4,206,176 |
| 2008 | $846,584,689 | 4,581,907 | 4,581,907 |
| 2009 | $452,037,645 | 5,589,566 | 5,589,566 |
| 2010 | $824,604,395 | 7,487,188 | 7,487,188 |
| 2011 | $993,185,800 | 6,618,645 | 6,618,645 |
Note: Quantity represents Weight in kilograms
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