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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $326,345,615 | 406,325,732 | 406,325,732 |
| 2006 | $327,922,711 | 436,538,952 | 436,538,952 |
| 2007 | $376,634,009 | 390,729,372 | 390,729,372 |
| 2008 | $641,767,381 | 355,807,032 | 355,807,032 |
| 2009 | $258,814,019 | 277,271,342 | 277,271,342 |
| 2010 | $446,714,363 | 365,740,546 | 365,740,546 |
| 2011 | $496,547,896 | 382,336,441 | 382,336,441 |
Note: Quantity represents Weight in kilograms
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