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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $3,261,271,604 | 5,376,779,840 | 5,376,779,840 |
| 2006 | $3,228,700,533 | 4,923,465,992 | 4,923,465,992 |
| 2007 | $2,504,837,866 | 4,141,479,976 | 4,141,479,976 |
| 2008 | $2,479,044,189 | 3,745,497,995 | 3,745,497,995 |
| 2009 | $1,519,401,642 | 2,408,160,984 | 2,408,160,984 |
| 2010 | $1,450,407,773 | 2,312,173,040 | 2,312,173,040 |
| 2011 | $1,537,971,644 | 2,278,673,984 | 2,278,673,984 |
Note: Quantity represents Weight in kilograms
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