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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $158,600,000 | 909,853,500 | 909,853,500 |
| 2006 | $224,667,000 | 1,288,592,300 | 1,288,592,300 |
| 2007 | $266,064,000 | 1,340,120,100 | 1,340,120,100 |
| 2008 | $241,842,000 | 1,040,321,200 | 1,040,321,200 |
| 2009 | $147,290,000 | 593,280,900 | 593,280,900 |
| 2010 | $141,350,123 | 584,424,100 | 584,424,100 |
| 2011 | $147,111,784 | 562,293,202 | 562,293,202 |
Note: Quantity represents Weight in kilograms
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