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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $975,787,199 | 1,521,102,415 | 1,521,102,415 |
| 2006 | $964,205,699 | 1,364,820,432 | 1,364,820,432 |
| 2007 | $975,635,786 | 1,314,805,888 | 1,314,805,888 |
| 2008 | $904,291,022 | 901,349,063 | 901,349,063 |
| 2009 | $698,079,924 | 640,238,088 | 640,238,088 |
| 2010 | $742,158,327 | 691,880,040 | 691,880,040 |
| 2011 | $783,814,337 | 680,186,303 | 680,186,303 |
Note: Quantity represents Weight in kilograms
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