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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,570,615,493 | 301,370,612 | 301,370,612 |
| 2006 | $1,844,018,070 | 750,007,066 | 750,007,066 |
| 2007 | $1,978,566,571 | 905,521,128 | 905,521,128 |
| 2008 | $1,903,171,152 | 252,207,246 | 252,207,246 |
| 2009 | $1,407,055,784 | 375,376,843 | 375,376,843 |
| 2010 | $2,187,061,780 | 0 | 0 |
| 2011 | $2,363,338,261 | 0 | 0 |
Note: Quantity represents Weight in kilograms
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