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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $2,354,608,325 | 12,882,640,940 | 12,882,640,940 |
| 2006 | $2,013,940,634 | 14,540,772,994 | 14,540,772,994 |
| 2007 | $3,057,681,269 | 15,329,707,692 | 15,329,707,692 |
| 2008 | $5,875,082,321 | 12,297,108,481 | 12,297,108,481 |
| 2009 | $204,257,045 | 565,341,998 | 565,341,998 |
| 2010 | $1,389,289,222 | 3,348,601,567 | 3,348,601,567 |
| 2011 | $1,487,838,768 | 3,299,217,741 | 3,299,217,741 |
Note: Quantity represents Weight in kilograms
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