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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $785,760,000 | 167,351,065 | 167,351,065 |
| 2006 | $1,296,882,000 | 208,373,503 | 208,373,503 |
| 2007 | $2,130,805,000 | 303,247,054 | 303,247,054 |
| 2008 | $2,000,049,000 | 273,508,826 | 273,508,826 |
| 2009 | $1,356,524,000 | 250,636,532 | 250,636,532 |
| 2010 | $2,168,808,644 | 334,798,400 | 334,798,400 |
| 2011 | $2,559,913,566 | 348,766,901 | 348,766,901 |
Note: Quantity represents Weight in kilograms
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