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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $559,252,232 | 19,914 | 19,914 |
| 2006 | $687,251,890 | 20,168 | 20,168 |
| 2007 | $650,692,196 | 16,161 | 16,161 |
| 2008 | $1,028,164,928 | 27,579 | 27,579 |
| 2009 | $1,819,133,037 | 50,042 | 50,042 |
| 2010 | $1,047,285,687 | 21,129 | 21,129 |
| 2011 | $1,428,127,992 | 26,871 | 26,871 |
Note: Quantity represents Weight in kilograms
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