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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $9,159,000 | 603,886,400 | 603,886,400 |
| 2006 | $10,318,000 | 674,586,300 | 674,586,300 |
| 2007 | $12,800,000 | 669,221,600 | 669,221,600 |
| 2008 | $13,953,000 | 644,924,900 | 644,924,900 |
| 2009 | $13,214,000 | 632,167,700 | 632,167,700 |
| 2010 | $14,008,076 | 698,940,900 | 698,940,900 |
| 2011 | $14,959,588 | 573,447,650 | 573,447,650 |
Note: Quantity represents Weight in kilograms
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