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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $218,285,536 | 30,471,759 | 30,471,759 |
| 2006 | $237,609,983 | 32,549,305 | 32,549,305 |
| 2007 | $278,937,521 | 41,859,317 | 41,859,317 |
| 2008 | $339,452,851 | 48,889,212 | 48,889,212 |
| 2009 | $270,730,674 | 31,126,758 | 31,126,758 |
| 2010 | $403,963,083 | 51,272,588 | 51,272,588 |
| 2011 | $457,793,048 | 66,673,126 | 66,673,126 |
Note: Quantity represents Weight in kilograms
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