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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,031,250,386 | 152,970,795 | 152,970,795 |
| 2006 | $1,256,373,083 | 177,137,453 | 177,137,453 |
| 2007 | $1,164,631,794 | 175,847,386 | 175,847,386 |
| 2008 | $1,218,929,158 | 163,731,991 | 163,731,991 |
| 2009 | $960,095,225 | 159,654,680 | 159,654,680 |
| 2010 | $1,131,301,758 | 166,237,831 | 166,237,831 |
Note: Quantity represents Weight in kilograms
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