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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $2,379,078,681 | 31,996,311 | 31,996,311 |
| 2006 | $2,300,694,127 | 32,422,597 | 32,422,597 |
| 2007 | $1,727,010,810 | 25,138,782 | 25,138,782 |
| 2008 | $1,512,587,042 | 21,877,367 | 21,877,367 |
| 2009 | $1,139,249,751 | 15,160,517 | 15,160,517 |
| 2010 | $1,070,018,381 | 14,452,608 | 14,452,608 |
| 2011 | $1,016,324,475 | 12,760,873 | 12,760,873 |
Note: Quantity represents Weight in kilograms
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