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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $419,650,000 | 486,825,220 | 486,825,220 |
| 2006 | $529,003,000 | 589,890,130 | 589,890,130 |
| 2007 | $709,153,000 | 709,166,600 | 709,166,600 |
| 2008 | $808,328,000 | 772,831,068 | 772,831,068 |
| 2009 | $552,215,000 | 544,729,800 | 544,729,800 |
| 2010 | $419,689,325 | 441,812,600 | 441,812,600 |
| 2011 | $386,318,244 | 377,290,515 | 377,290,515 |
Note: Quantity represents Weight in kilograms
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