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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $964,580,186 | 497,013,318 | 497,013,318 |
| 2006 | $1,163,083,182 | 451,308,501 | 451,308,501 |
| 2007 | $1,217,004,573 | 434,659,162 | 434,659,162 |
| 2008 | $907,433,770 | 319,135,520 | 319,135,520 |
| 2009 | $595,731,092 | 322,791,229 | 322,791,229 |
| 2010 | $1,144,957,183 | 516,803,214 | 516,803,214 |
| 2011 | $1,065,451,569 | 412,639,559 | 412,639,559 |
Note: Quantity represents Weight in kilograms
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