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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $10,486,608,413 | 11,589,413 | 11,589,413 |
| 2006 | $11,781,724,290 | 148,169,383 | 148,169,383 |
| 2007 | $12,178,811,856 | 20,671,779 | 20,671,779 |
| 2008 | $13,894,073,590 | 20,883,341 | 20,883,341 |
| 2009 | $9,193,908,079 | 200,491,376 | 200,491,376 |
| 2010 | $13,147,239,271 | 297,125,286 | 297,125,286 |
| 2011 | $11,575,029,917 | 84,047,116 | 84,047,116 |
Note: Quantity represents Weight in kilograms
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