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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $125,804,762 | 336,563,958 | 336,563,958 |
| 2006 | $216,190,646 | 460,615,103 | 460,615,103 |
| 2007 | $280,417,812 | 503,251,811 | 503,251,811 |
| 2008 | $274,318,889 | 385,426,577 | 385,426,577 |
| 2009 | $121,475,053 | 310,797,623 | 310,797,623 |
| 2010 | $247,327,296 | 427,730,596 | 427,730,596 |
| 2011 | $449,447,396 | 565,834,532 | 565,834,532 |
Note: Quantity represents Weight in kilograms
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