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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $457,168,201 | 93,667,422 | 93,667,422 |
| 2006 | $633,649,457 | 101,529,122 | 101,529,122 |
| 2007 | $983,055,713 | 122,464,959 | 122,464,959 |
| 2008 | $1,079,013,602 | 120,588,999 | 120,588,999 |
| 2009 | $601,791,694 | 79,222,305 | 79,222,305 |
| 2010 | $751,297,334 | 92,062,815 | 92,062,815 |
| 2011 | $953,831,397 | 97,134,960 | 97,134,960 |
Note: Quantity represents Weight in kilograms
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