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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $529,700,000 | 450,743,102 | 450,743,102 |
| 2006 | $594,162,000 | 563,986,240 | 563,986,240 |
| 2007 | $695,904,000 | 577,295,184 | 577,295,184 |
| 2008 | $708,191,000 | 498,017,423 | 498,017,423 |
| 2009 | $644,288,000 | 473,296,708 | 473,296,708 |
| 2010 | $718,849,462 | 524,769,469 | 524,769,469 |
| 2011 | $825,369,880 | 581,138,568 | 581,138,568 |
Note: Quantity represents Weight in kilograms
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