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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,070,042,281 | 68,823,222 | 68,823,222 |
| 2006 | $1,196,589,460 | 76,962,512 | 76,962,512 |
| 2007 | $1,480,200,592 | 92,570,118 | 92,570,118 |
| 2008 | $1,650,938,626 | 92,618,394 | 92,618,394 |
| 2009 | $796,927,702 | 37,688,624 | 37,688,624 |
| 2010 | $1,097,205,784 | 56,315,331 | 56,315,331 |
| 2011 | $738,276,679 | 43,274,535 | 43,274,535 |
Note: Quantity represents Weight in kilograms
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