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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $451,001,018 | 445,803,148 | 445,803,148 |
| 2006 | $536,495,623 | 523,033,388 | 523,033,388 |
| 2007 | $711,143,933 | 553,548,435 | 553,548,435 |
| 2008 | $917,319,061 | 623,805,940 | 623,805,940 |
| 2009 | $543,588,164 | 398,434,514 | 398,434,514 |
| 2010 | $560,683,106 | 466,654,312 | 466,654,312 |
| 2011 | $774,416,829 | 573,219,996 | 573,219,996 |
Note: Quantity represents Weight in kilograms
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