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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $4,046,871,033 | 10,603,533,902 | 10,603,533,902 |
| 2006 | $5,877,644,282 | 12,176,668,713 | 12,176,668,713 |
| 2007 | $6,387,340,341 | 12,156,290,614 | 12,156,290,614 |
| 2008 | $8,238,017,129 | 11,908,304,164 | 11,908,304,164 |
| 2009 | $5,234,736,636 | 11,516,561,593 | 11,516,561,593 |
| 2010 | $6,558,983,418 | 11,211,579,622 | 11,211,579,622 |
| 2011 | $9,456,121,640 | 11,504,505,428 | 11,504,505,428 |
Note: Quantity represents Weight in kilograms
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