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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $864,362,650 | 3,201,705,056 | 3,201,705,056 |
| 2006 | $700,493,668 | 3,690,042,000 | 3,690,042,000 |
| 2007 | $541,097,785 | 2,231,303,968 | 2,231,303,968 |
| 2008 | $1,821,605,967 | 8,270,476,706 | 8,270,476,706 |
| 2009 | $100,822,271 | 314,514,000 | 314,514,000 |
| 2010 | $433,473,517 | 1,101,307,000 | 1,101,307,000 |
| 2011 | $587,801,002 | 1,286,220,984 | 1,286,220,984 |
Note: Quantity represents Weight in kilograms
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