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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $376,866,389 | 3,154,770,440 | 3,154,770,440 |
| 2006 | $396,083,168 | 3,603,867,634 | 3,603,867,634 |
| 2007 | $296,657,987 | 2,365,279,784 | 2,365,279,784 |
| 2008 | $381,054,519 | 1,743,604,739 | 1,743,604,739 |
| 2009 | $241,827,924 | 1,857,111,176 | 1,857,111,176 |
| 2010 | $369,490,837 | 2,023,516,365 | 2,023,516,365 |
| 2011 | $449,481,565 | 1,769,688,885 | 1,769,688,885 |
Note: Quantity represents Weight in kilograms
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