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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $595,377,297 | 3,024,681,820 | 3,024,681,820 |
| 2006 | $739,268,492 | 4,320,856,173 | 4,320,856,173 |
| 2007 | $1,547,446,365 | 6,088,451,459 | 6,088,451,459 |
| 2008 | $2,709,689,291 | 6,837,693,521 | 6,837,693,521 |
| 2009 | $1,310,703,753 | 6,755,698,330 | 6,755,698,330 |
| 2010 | $2,397,133,381 | 8,657,555,523 | 8,657,555,523 |
| 2011 | $2,663,968,517 | 9,440,898,598 | 9,440,898,598 |
Note: Quantity represents Weight in kilograms
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