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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $80,936,539 | 547,963,548 | 547,963,548 |
| 2006 | $142,963,390 | 909,160,591 | 909,160,591 |
| 2007 | $189,992,089 | 1,026,904,945 | 1,026,904,945 |
| 2008 | $512,078,440 | 1,649,192,513 | 1,649,192,513 |
| 2009 | $241,395,963 | 934,898,640 | 934,898,640 |
| 2010 | $212,869,182 | 1,026,254,419 | 1,026,254,419 |
| 2011 | $517,650,638 | 1,604,521,666 | 1,604,521,666 |
Note: Quantity represents Weight in kilograms
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