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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $238,693,000 | 249,994,200 | 249,994,200 |
| 2006 | $232,949,000 | 259,857,500 | 259,857,500 |
| 2007 | $261,673,000 | 250,804,417 | 250,804,417 |
| 2008 | $343,533,000 | 275,516,702 | 275,516,702 |
| 2009 | $189,512,000 | 201,540,900 | 201,540,900 |
| 2010 | $319,459,650 | 319,988,281 | 319,988,281 |
| 2011 | $474,866,941 | 387,170,168 | 387,170,168 |
Note: Quantity represents Weight in kilograms
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