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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $645,068,693 | 267,525,119 | 267,525,119 |
| 2006 | $673,581,428 | 256,750,102 | 256,750,102 |
| 2007 | $805,065,956 | 237,525,454 | 237,525,454 |
| 2008 | $746,687,511 | 195,448,984 | 195,448,984 |
| 2009 | $545,949,566 | 207,926,376 | 207,926,376 |
| 2010 | $673,995,921 | 242,817,440 | 242,817,440 |
| 2011 | $571,190,457 | 188,233,517 | 188,233,517 |
Note: Quantity represents Weight in kilograms
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