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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $455,663,160 | 1,027,065,075 | 1,027,065,075 |
| 2006 | $114,834,787 | 242,282,755 | 242,282,755 |
| 2007 | $142,578,057 | 235,665,562 | 235,665,562 |
| 2008 | $524,715,442 | 989,377,245 | 989,377,245 |
| 2009 | $750,058,355 | 1,227,312,929 | 1,227,312,929 |
| 2010 | $839,808,636 | 950,447,567 | 950,447,567 |
| 2011 | $1,182,346,725 | 1,000,261,922 | 1,000,261,922 |
Note: Quantity represents Weight in kilograms
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