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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $216,985,000 | 4,709,500 | 4,709,500 |
| 2006 | $273,545,000 | 4,053,000 | 4,053,000 |
| 2007 | $611,025,000 | 4,668,923 | 4,668,923 |
| 2008 | $562,715,000 | 4,323,600 | 4,323,600 |
| 2009 | $502,434,000 | 4,661,300 | 4,661,300 |
| 2010 | $643,007,819 | 6,705,414 | 6,705,414 |
| 2011 | $801,948,993 | 8,134,833 | 8,134,833 |
Note: Quantity represents Weight in kilograms
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