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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $97,437,877 | 14,676,421,706 | 14,676,421,706 |
| 2006 | $114,519,000 | 16,807,783,350 | 16,807,783,350 |
| 2007 | $131,715,878 | 16,420,941,697 | 16,420,941,697 |
| 2008 | $162,303,004 | 17,964,737,149 | 17,964,737,149 |
| 2009 | $138,726,319 | 15,941,392,705 | 15,941,392,705 |
| 2010 | $131,548,571 | 16,455,352,418 | 16,455,352,418 |
| 2011 | $159,286,194 | 18,206,631,243 | 18,206,631,243 |
Note: Quantity represents Weight in kilograms
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