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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $2,468,775,863 | 6,643,098,611 | 6,643,098,611 |
| 2006 | $3,211,078,664 | 8,269,606,064 | 8,269,606,064 |
| 2007 | $3,836,350,433 | 8,239,782,781 | 8,239,782,781 |
| 2008 | $5,805,593,108 | 8,090,784,069 | 8,090,784,069 |
| 2009 | $1,963,817,229 | 5,789,770,245 | 5,789,770,245 |
| 2010 | $3,825,596,005 | 8,352,219,502 | 8,352,219,502 |
| 2011 | $4,919,436,006 | 8,095,990,731 | 8,095,990,731 |
Note: Quantity represents Weight in kilograms
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