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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $282,016,731 | 125,718,754 | 125,718,754 |
| 2006 | $306,731,398 | 130,237,730 | 130,237,730 |
| 2007 | $318,167,735 | 134,455,034 | 134,455,034 |
| 2008 | $329,097,674 | 132,168,554 | 132,168,554 |
| 2009 | $314,063,019 | 131,859,466 | 131,859,466 |
| 2010 | $394,094,061 | 166,825,475 | 166,825,475 |
| 2011 | $439,209,544 | 152,769,788 | 152,769,788 |
Note: Quantity represents Weight in kilograms
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