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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $12,670,751,152 | 62,768,177 | 62,768,177 |
| 2006 | $15,796,710,358 | 68,847,237 | 68,847,237 |
| 2007 | $17,694,204,208 | 74,035,745 | 74,035,745 |
| 2008 | $21,141,946,549 | 81,251,860 | 81,251,860 |
| 2009 | $22,181,946,962 | 80,339,154 | 80,339,154 |
| 2010 | $23,434,964,159 | 80,588,783 | 80,588,783 |
| 2011 | $26,928,915,524 | 82,705,087 | 82,705,087 |
Note: Quantity represents Weight in kilograms
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