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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $5,487,431,156 | 63,263,435 | 63,263,435 |
| 2006 | $5,358,815,423 | 74,809,942 | 74,809,942 |
| 2007 | $4,255,321,781 | 80,090,927 | 80,090,927 |
| 2008 | $4,591,966,485 | 79,042,857 | 79,042,857 |
| 2009 | $3,369,445,747 | 69,020,331 | 69,020,331 |
| 2010 | $4,471,368,972 | 107,625,941 | 107,625,941 |
| 2011 | $4,374,527,915 | 76,991,023 | 76,991,023 |
Note: Quantity represents Weight in kilograms
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