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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $4,983,003 | 370,915,797 | 370,915,797 |
| 2006 | $6,196,972 | 437,141,426 | 437,141,426 |
| 2007 | $5,679,971 | 418,278,244 | 418,278,244 |
| 2008 | $8,317,407 | 570,375,653 | 570,375,653 |
| 2009 | $9,438,104 | 633,937,071 | 633,937,071 |
| 2010 | $18,844,520 | 1,132,798,571 | 1,132,798,571 |
| 2011 | $20,151,241 | 1,017,538,540 | 1,017,538,540 |
Note: Quantity represents Weight in kilograms
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