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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $959,501,152 | 15,957,907 | 15,957,907 |
| 2006 | $1,052,087,098 | 19,818,490 | 19,818,490 |
| 2007 | $1,214,153,236 | 20,874,199 | 20,874,199 |
| 2008 | $1,401,344,202 | 21,122,101 | 21,122,101 |
| 2009 | $1,342,588,136 | 22,782,427 | 22,782,427 |
| 2010 | $1,388,558,004 | 24,342,420 | 24,342,420 |
| 2011 | $1,547,456,714 | 22,732,369 | 22,732,369 |
Note: Quantity represents Weight in kilograms
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