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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $146,164,160 | 2,899,379,952 | 2,899,379,952 |
| 2006 | $173,925,641 | 3,863,808,992 | 3,863,808,992 |
| 2007 | $225,426,036 | 2,870,984,968 | 2,870,984,968 |
| 2008 | $242,561,728 | 0 | 0 |
| 2009 | $163,515,303 | 2,240,779,000 | 2,240,779,000 |
| 2010 | $312,789,088 | 4,060,870,056 | 4,060,870,056 |
| 2011 | $362,555,662 | 4,267,262,000 | 4,267,262,000 |
Note: Quantity represents Weight in kilograms
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