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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $289,924,000 | 309,006,500 | 309,006,500 |
| 2006 | $362,072,000 | 362,052,800 | 362,052,800 |
| 2007 | $432,792,000 | 357,970,554 | 357,970,554 |
| 2008 | $579,812,000 | 422,270,628 | 422,270,628 |
| 2009 | $380,012,000 | 331,194,900 | 331,194,900 |
| 2010 | $425,433,920 | 376,826,300 | 376,826,300 |
| 2011 | $647,738,934 | 511,708,688 | 511,708,688 |
Note: Quantity represents Weight in kilograms
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