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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $523,221,490 | 28,042,974 | 28,042,974 |
| 2006 | $544,258,783 | 29,170,505 | 29,170,505 |
| 2007 | $518,275,291 | 25,379,338 | 25,379,338 |
| 2008 | $565,743,782 | 25,238,668 | 25,238,668 |
| 2009 | $411,926,209 | 16,564,595 | 16,564,595 |
| 2010 | $508,427,333 | 20,413,906 | 20,413,906 |
| 2011 | $601,313,672 | 22,294,041 | 22,294,041 |
Note: Quantity represents Weight in kilograms
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