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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $598,668,313 | 4,415,893 | 4,415,893 |
| 2006 | $498,829,732 | 5,335,522 | 5,335,522 |
| 2007 | $445,397,405 | 5,907,559 | 5,907,559 |
| 2008 | $575,246,573 | 6,834,639 | 6,834,639 |
| 2009 | $491,102,472 | 5,662,678 | 5,662,678 |
| 2010 | $651,969,210 | 8,156,284 | 8,156,284 |
| 2011 | $616,721,873 | 9,099,821 | 9,099,821 |
Note: Quantity represents Weight in kilograms
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