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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $475,107,000 | 226,282,600 | 226,282,600 |
| 2006 | $540,312,000 | 232,978,700 | 232,978,700 |
| 2007 | $669,660,000 | 251,188,800 | 251,188,800 |
| 2008 | $717,221,000 | 229,444,200 | 229,444,200 |
| 2009 | $136,068,000 | 57,064,736 | 57,064,736 |
| 2010 | $154,523,438 | 66,597,226 | 66,597,226 |
| 2011 | $227,273,090 | 79,456,960 | 79,456,960 |
Note: Quantity represents Weight in kilograms
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