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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $561,610,000 | 313,810,700 | 313,810,700 |
| 2006 | $610,903,000 | 308,512,505 | 308,512,505 |
| 2007 | $738,620,000 | 277,775,976 | 277,775,976 |
| 2008 | $764,465,000 | 303,660,900 | 303,660,900 |
| 2009 | $654,994,000 | 326,428,300 | 326,428,300 |
| 2010 | $759,484,259 | 331,610,700 | 331,610,700 |
| 2011 | $825,544,495 | 350,748,048 | 350,748,048 |
Note: Quantity represents Weight in kilograms
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