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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $56,289,374 | 546,012,000 | 546,012,000 |
| 2006 | $168,336,261 | 1,118,110,420 | 1,118,110,420 |
| 2007 | $153,791,944 | 775,885,358 | 775,885,358 |
| 2008 | $39,979,502 | 124,935,877 | 124,935,877 |
| 2010 | $5,391,181 | 30,000,000 | 30,000,000 |
Note: Quantity represents Weight in kilograms
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