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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $284,631,000 | 67,618,000 | 67,618,000 |
| 2006 | $488,513,000 | 74,516,200 | 74,516,200 |
| 2007 | $574,858,000 | 71,814,400 | 71,814,400 |
| 2008 | $487,429,000 | 62,070,200 | 62,070,200 |
| 2009 | $243,524,000 | 42,342,900 | 42,342,900 |
| 2010 | $453,763,867 | 64,079,561 | 64,079,561 |
| 2011 | $496,168,272 | 58,581,944 | 58,581,944 |
Note: Quantity represents Weight in kilograms
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