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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $512,442,597 | 276,800,230 | 276,800,230 |
| 2006 | $556,694,965 | 292,917,282 | 292,917,282 |
| 2007 | $524,772,759 | 261,420,292 | 261,420,292 |
| 2008 | $515,252,913 | 123,620,714 | 123,620,714 |
| 2009 | $317,544,296 | 135,431,172 | 135,431,172 |
| 2010 | $470,965,792 | 203,948,738 | 203,948,738 |
| 2011 | $613,685,773 | 236,353,274 | 236,353,274 |
Note: Quantity represents Weight in kilograms
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