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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $1,786,052,886 | 504,829,880 | 504,829,880 |
| 2006 | $2,079,826,140 | 523,434,731 | 523,434,731 |
| 2007 | $2,327,920,578 | 530,285,211 | 530,285,211 |
| 2008 | $2,436,850,635 | 471,882,544 | 471,882,544 |
| 2009 | $1,926,715,738 | 352,408,523 | 352,408,523 |
| 2010 | $2,334,532,793 | 430,646,753 | 430,646,753 |
| 2011 | $2,676,027,131 | 491,980,972 | 491,980,972 |
Note: Quantity represents Weight in kilograms
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