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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $144,075,000 | 779,753,846 | 779,753,846 |
| 2006 | $172,614,000 | 934,210,865 | 934,210,865 |
| 2007 | $234,581,000 | 1,065,183,243 | 1,065,183,243 |
| 2008 | $235,238,000 | 796,836,613 | 796,836,613 |
| 2009 | $162,999,000 | 894,681,614 | 894,681,614 |
| 2010 | $218,132,000 | 980,934,312 | 980,934,312 |
| 2011 | $342,719,000 | 1,108,641,176 | 1,108,641,176 |
Note: Quantity represents Weight in kilograms
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