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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $10,000 | 1,556 | 1,556 |
| 2006 | $5,000 | 778 | 778 |
| 2007 | $4,000 | 0 | 0 |
| 2008 | $55,652,000 | 8,918,262 | 8,918,262 |
| 2009 | $120,999,000 | 26,565,235 | 26,565,235 |
| 2010 | $147,523,000 | 32,452,085 | 32,452,085 |
| 2011 | $117,792,000 | 37,180,693 | 37,180,693 |
Note: Quantity represents Weight in kilograms
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