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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $388,724,000 | 8,164,075 | 8,164,075 |
| 2006 | $435,620,000 | 9,545,385 | 9,545,385 |
| 2007 | $471,075,000 | 9,505,427 | 9,505,427 |
| 2008 | $512,370,000 | 9,618,102 | 9,618,102 |
| 2009 | $402,630,000 | 8,516,215 | 8,516,215 |
| 2010 | $404,707,776 | 8,287,785 | 8,287,785 |
| 2011 | $500,297,507 | 9,181,628 | 9,181,628 |
Note: Quantity represents Weight in kilograms
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