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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $176,738,479 | 252,084,316 | 252,084,316 |
| 2006 | $141,324,205 | 199,218,904 | 199,218,904 |
| 2007 | $123,352,860 | 137,966,059 | 137,966,059 |
| 2008 | $365,221,076 | 351,804,915 | 351,804,915 |
| 2009 | $160,483,792 | 204,196,535 | 204,196,535 |
| 2010 | $402,794,165 | 380,622,166 | 380,622,166 |
| 2011 | $530,636,160 | 451,549,052 | 451,549,052 |
Note: Quantity represents Weight in kilograms
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