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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $983,948,170 | 13,808,542,418 | 13,808,542,418 |
| 2006 | $1,669,102,976 | 14,795,429,983 | 14,795,429,983 |
| 2007 | $1,988,723,090 | 15,772,023,124 | 15,772,023,124 |
| 2008 | $3,159,086,022 | 9,225,356,049 | 9,225,356,049 |
| 2009 | $1,967,277,217 | 7,518,311,972 | 7,518,311,972 |
| 2010 | $2,797,774,139 | 8,856,825,716 | 8,856,825,716 |
| 2011 | $3,884,883,593 | 9,606,824,173 | 9,606,824,173 |
Note: Quantity represents Weight in kilograms
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