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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $603,639,047 | 1,029,974,476 | 1,029,974,476 |
| 2006 | $963,375,921 | 1,188,454,092 | 1,188,454,092 |
| 2007 | $1,663,121,877 | 1,265,296,466 | 1,265,296,466 |
| 2008 | $1,573,352,453 | 1,441,767,543 | 1,441,767,543 |
| 2009 | $1,736,652,671 | 1,604,828,606 | 1,604,828,606 |
| 2010 | $2,512,915,600 | 1,602,894,498 | 1,602,894,498 |
| 2011 | $3,017,866,828 | 1,443,327,307 | 1,443,327,307 |
Note: Quantity represents Weight in kilograms
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