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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,326,835,000 | 671,358,702 | 671,358,702 |
| 2006 | $2,062,362,000 | 782,915,500 | 782,915,500 |
| 2007 | $2,307,186,000 | 786,505,941 | 786,505,941 |
| 2008 | $2,011,439,000 | 693,074,689 | 693,074,689 |
| 2009 | $988,220,000 | 495,511,401 | 495,511,401 |
| 2010 | $1,871,380,100 | 799,779,900 | 799,779,900 |
| 2011 | $2,114,636,756 | 769,599,739 | 769,599,739 |
Note: Quantity represents Weight in kilograms
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