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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $32,900 | 12,211 | 12,211 |
| 2006 | $31,200 | 10,348 | 10,348 |
| 2007 | $17,000 | 5,404 | 5,404 |
| 2008 | $134,400 | 78,929 | 78,929 |
| 2009 | $268,500 | 238,059 | 238,059 |
| 2010 | $222,000 | 195,553 | 195,553 |
| 2011 | $301,800 | 231,630 | 231,630 |
Note: Quantity represents Weight in kilograms
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