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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $533,351,608 | 35,481,011 | 35,481,011 |
| 2006 | $677,087,730 | 41,082,177 | 41,082,177 |
| 2007 | $773,478,003 | 38,593,682 | 38,593,682 |
| 2008 | $811,276,377 | 31,060,792 | 31,060,792 |
| 2009 | $714,847,079 | 32,174,140 | 32,174,140 |
| 2010 | $770,297,465 | 37,609,802 | 37,609,802 |
| 2011 | $848,567,282 | 27,956,325 | 27,956,325 |
Note: Quantity represents Weight in kilograms
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