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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $11,361,348 | 546,949,086 | 546,949,086 |
| 2006 | $14,038,014 | 433,771,511 | 433,771,511 |
| 2007 | $167,197,656 | 3,013,820,352 | 3,013,820,352 |
| 2008 | $391,524,166 | 4,354,560,646 | 4,354,560,646 |
| 2009 | $1,192,247,341 | 19,045,800,836 | 19,045,800,836 |
| 2010 | $3,006,946,096 | 39,850,528,016 | 39,850,528,016 |
| 2011 | $4,274,652,805 | 46,310,052,063 | 46,310,052,063 |
Note: Quantity represents Weight in kilograms
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