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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $28,241,044,252 | 505,206,516 | 505,206,516 |
| 2006 | $32,033,365,886 | 407,247,026 | 407,247,026 |
| 2007 | $22,024,945,372 | 0 | 0 |
| 2008 | $18,611,190,771 | 0 | 0 |
| 2009 | $18,518,904,860 | 0 | 0 |
| 2010 | $22,807,146,604 | 0 | 0 |
| 2011 | $16,131,760,590 | 0 | 0 |
Note: Quantity represents Weight in kilograms
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