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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $496,235,741 | 41,186,920 | 41,186,920 |
| 2006 | $418,477,500 | 42,241,289 | 42,241,289 |
| 2007 | $447,999,977 | 49,581,519 | 49,581,519 |
| 2008 | $533,034,777 | 0 | 0 |
| 2009 | $537,404,991 | 38,107,617 | 38,107,617 |
| 2010 | $647,878,630 | 40,674,403 | 40,674,403 |
| 2011 | $658,515,932 | 47,722,662 | 47,722,662 |
Note: Quantity represents Weight in kilograms
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