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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $2,861,659,866 | 47,205,195,861 | 47,205,195,861 |
| 2006 | $3,198,375,466 | 45,651,122,318 | 45,651,122,318 |
| 2007 | $3,443,804,503 | 50,051,004,124 | 50,051,004,124 |
| 2008 | $5,484,825,164 | 49,990,182,207 | 49,990,182,207 |
| 2009 | $2,664,711,381 | 30,264,161,578 | 30,264,161,578 |
| 2010 | $7,558,004,219 | 52,110,616,458 | 52,110,616,458 |
| 2011 | $9,965,454,201 | 56,032,942,828 | 56,032,942,828 |
Note: Quantity represents Weight in kilograms
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