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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $517,174,000 | 28,499,760 | 28,499,760 |
| 2006 | $457,514,000 | 25,313,112 | 25,313,112 |
| 2007 | $471,648,000 | 25,630,147 | 25,630,147 |
| 2008 | $540,165,000 | 24,632,522 | 24,632,522 |
| 2009 | $442,060,000 | 20,985,444 | 20,985,444 |
| 2010 | $593,429,894 | 29,968,291 | 29,968,291 |
| 2011 | $921,576,041 | 46,166,077 | 46,166,077 |
Note: Quantity represents Weight in kilograms
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