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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,079,119,671 | 195,126,395 | 195,126,395 |
| 2006 | $1,246,847,594 | 223,226,007 | 223,226,007 |
| 2007 | $1,757,473,053 | 288,006,674 | 288,006,674 |
| 2008 | $1,936,672,390 | 311,188,443 | 311,188,443 |
| 2009 | $906,676,583 | 141,452,311 | 141,452,311 |
| 2010 | $1,030,095,861 | 192,168,801 | 192,168,801 |
| 2011 | $1,096,972,999 | 210,667,678 | 210,667,678 |
Note: Quantity represents Weight in kilograms
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