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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $28,070,105 | 123,564,900 | 123,564,900 |
| 2006 | $28,307,929 | 120,241,100 | 120,241,100 |
| 2007 | $30,974,648 | 118,948,800 | 118,948,800 |
| 2008 | $30,326,915 | 105,726,800 | 105,726,800 |
| 2009 | $18,407,167 | 63,241,000 | 63,241,000 |
| 2010 | $22,452,348 | 81,104,077 | 81,104,077 |
| 2011 | $22,923,141 | 75,405,700 | 75,405,700 |
Note: Quantity represents Weight in kilograms
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