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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $3,101,324,225 | 50,807,426 | 50,807,426 |
| 2006 | $3,717,528,949 | 51,563,713 | 51,563,713 |
| 2007 | $3,285,421,298 | 35,201,940 | 35,201,940 |
| 2008 | $3,217,187,740 | 26,943,665 | 26,943,665 |
| 2009 | $3,023,098,794 | 17,703,226 | 17,703,226 |
| 2010 | $3,610,715,271 | 23,634,777 | 23,634,777 |
| 2011 | $3,975,038,531 | 24,518,398 | 24,518,398 |
Note: Quantity represents Weight in kilograms
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