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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $3,179,867,592 | 4,821,213,785 | 4,821,213,785 |
| 2006 | $4,043,448,309 | 4,942,873,994 | 4,942,873,994 |
| 2007 | $6,390,676,901 | 5,584,644,086 | 5,584,644,086 |
| 2008 | $5,970,255,466 | 5,576,908,916 | 5,576,908,916 |
| 2009 | $6,090,204,565 | 3,998,097,725 | 3,998,097,725 |
| 2010 | $12,250,382,879 | 4,364,085,032 | 4,364,085,032 |
| 2011 | $16,337,925,536 | 4,687,270,522 | 4,687,270,522 |
Note: Quantity represents Weight in kilograms
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