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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,536,689,958 | 447,698,216 | 447,698,216 |
| 2006 | $1,676,348,878 | 442,164,843 | 442,164,843 |
| 2007 | $1,763,736,036 | 419,201,042 | 419,201,042 |
| 2008 | $1,785,622,928 | 358,984,930 | 358,984,930 |
| 2009 | $1,683,931,155 | 312,579,554 | 312,579,554 |
| 2010 | $1,879,727,666 | 378,364,390 | 378,364,390 |
| 2011 | $2,000,936,769 | 403,094,277 | 403,094,277 |
Note: Quantity represents Weight in kilograms
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