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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $5,613,773,245 | 111,273,999 | 111,273,999 |
| 2006 | $5,569,169,658 | 65,225,153 | 65,225,153 |
| 2007 | $3,342,242,226 | 0 | 0 |
| 2008 | $2,573,876,913 | 0 | 0 |
| 2009 | $1,878,297,419 | 0 | 0 |
| 2010 | $2,277,282,609 | 0 | 0 |
| 2011 | $2,670,313,712 | 0 | 0 |
Note: Quantity represents Weight in kilograms
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