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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $2,226,341,002 | 9,345,377,143 | 9,345,377,143 |
| 2006 | $1,409,711,397 | 4,836,731,663 | 4,836,731,663 |
| 2007 | $1,327,076,264 | 2,780,736,821 | 2,780,736,821 |
| 2008 | $1,679,548,767 | 3,069,532,416 | 3,069,532,416 |
| 2009 | $4,480,370,662 | 12,881,145,599 | 12,881,145,599 |
| 2010 | $2,747,177,213 | 5,509,897,738 | 5,509,897,738 |
| 2011 | $3,762,751,119 | 6,474,059,440 | 6,474,059,440 |
Note: Quantity represents Weight in kilograms
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