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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $292,005,000 | 3,768,427,800 | 3,768,427,800 |
| 2006 | $296,376,000 | 4,197,457,800 | 4,197,457,800 |
| 2007 | $354,591,000 | 4,353,425,600 | 4,353,425,600 |
| 2008 | $563,034,000 | 4,137,690,000 | 4,137,690,000 |
| 2009 | $503,510,000 | 3,893,428,500 | 3,893,428,500 |
| 2010 | $390,847,111 | 3,643,047,900 | 3,643,047,900 |
| 2011 | $377,256,216 | 2,503,331,492 | 2,503,331,492 |
Note: Quantity represents Weight in kilograms
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