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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $2,073,762,910 | 2,773,601,092 | 2,773,601,092 |
| 2006 | $2,410,196,364 | 2,945,558,080 | 2,945,558,080 |
| 2007 | $2,434,235,291 | 3,010,724,829 | 3,010,724,829 |
| 2008 | $2,983,064,414 | 3,512,870,390 | 3,512,870,390 |
| 2009 | $2,891,555,419 | 3,617,817,908 | 3,617,817,908 |
| 2010 | $3,377,220,269 | 3,650,943,301 | 3,650,943,301 |
| 2011 | $4,475,171,367 | 3,617,306,322 | 3,617,306,322 |
Note: Quantity represents Weight in kilograms
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