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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,426,105,559 | 7,356,401 | 7,356,401 |
| 2006 | $1,091,720,803 | 6,705,276 | 6,705,276 |
| 2007 | $3,724,984,086 | 41,683,554 | 41,683,554 |
| 2008 | $4,331,824,388 | 42,882,511 | 42,882,511 |
| 2009 | $2,974,881,097 | 24,184,759 | 24,184,759 |
| 2010 | $3,357,637,336 | 23,202,930 | 23,202,930 |
| 2011 | $3,177,310,820 | 27,838,606 | 27,838,606 |
Note: Quantity represents Weight in kilograms
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